//MooTools More, <http://mootools.net/more>. Copyright (c) 2006-2008 Valerio Proietti, <http://mad4milk.net>, MIT Style License.

/*
Script: Fx.Slide.js
  Effect to slide an element in and out of view.

License:
  MIT-style license.
*/

Fx.Slide = new Class({

  Extends: Fx,

  options: {
    mode: 'vertical'
  },

  initialize: function(element, options){
    this.addEvent('complete', function(){
      this.open = (this.wrapper['offset' + this.layout.capitalize()] != 0);
      if (this.open && Browser.Engine.webkit419) this.element.dispose().inject(this.wrapper);
    }, true);
    this.element = this.subject = $(element);
    this.parent(options);
    var wrapper = this.element.retrieve('wrapper');
    this.wrapper = wrapper || new Element('div', {
      styles: $extend(this.element.getStyles('margin', 'position'), {'overflow': 'hidden'})
    }).wraps(this.element);
    this.element.store('wrapper', this.wrapper).setStyle('margin', 0);
    this.now = [];
    this.open = true;
  },

  vertical: function(){
    this.margin = 'margin-top';
    this.layout = 'height';
    this.offset = this.element.offsetHeight;
  },

  horizontal: function(){
    this.margin = 'margin-left';
    this.layout = 'width';
    this.offset = this.element.offsetWidth;
  },

  set: function(now){
    this.element.setStyle(this.margin, now[0]);
    this.wrapper.setStyle(this.layout, now[1]);
    return this;
  },

  compute: function(from, to, delta){
    var now = [];
    var x = 2;
    x.times(function(i){
      now[i] = Fx.compute(from[i], to[i], delta);
    });
    return now;
  },

  start: function(how, mode){
    if (!this.check(arguments.callee, how, mode)) return this;
    this[mode || this.options.mode]();
    var margin = this.element.getStyle(this.margin).toInt();
    var layout = this.wrapper.getStyle(this.layout).toInt();
    var caseIn = [[margin, layout], [0, this.offset]];
    var caseOut = [[margin, layout], [-this.offset, 0]];
    var start;
    switch (how){
      case 'in': start = caseIn; break;
      case 'out': start = caseOut; break;
      case 'toggle': start = (this.wrapper['offset' + this.layout.capitalize()] == 0) ? caseIn : caseOut;
    }
    return this.parent(start[0], start[1]);
  },

  slideIn: function(mode){
    return this.start('in', mode);
  },

  slideOut: function(mode){
    return this.start('out', mode);
  },

  hide: function(mode){
    this[mode || this.options.mode]();
    this.open = false;
    return this.set([-this.offset, 0]);
  },

  show: function(mode){
    this[mode || this.options.mode]();
    this.open = true;
    return this.set([0, this.offset]);
  },

  toggle: function(mode){
    return this.start('toggle', mode);
  }

});

Element.Properties.slide = {

  set: function(options){
    var slide = this.retrieve('slide');
    if (slide) slide.cancel();
    return this.eliminate('slide').store('slide:options', $extend({link: 'cancel'}, options));
  },

  get: function(options){
    if (options || !this.retrieve('slide')){
      if (options || !this.retrieve('slide:options')) this.set('slide', options);
      this.store('slide', new Fx.Slide(this, this.retrieve('slide:options')));
    }
    return this.retrieve('slide');
  }

};

Element.implement({

  slide: function(how, mode){
    how = how || 'toggle';
    var slide = this.get('slide'), toggle;
    switch (how){
      case 'hide': slide.hide(mode); break;
      case 'show': slide.show(mode); break;
      case 'toggle':
        var flag = this.retrieve('slide:flag', slide.open);
        slide[(flag) ? 'slideOut' : 'slideIn'](mode);
        this.store('slide:flag', !flag);
        toggle = true;
      break;
      default: slide.start(how, mode);
    }
    if (!toggle) this.eliminate('slide:flag');
    return this;
  }

});


/*
Script: Fx.Scroll.js
  Effect to smoothly scroll any element, including the window.

License:
  MIT-style license.
*/

Fx.Scroll = new Class({

  Extends: Fx,

  options: {
    offset: {'x': 0, 'y': 0},
    wheelStops: true
  },

  initialize: function(element, options){
    this.element = this.subject = $(element);
    this.parent(options);
    var cancel = this.cancel.bind(this, false);

    if ($type(this.element) != 'element') this.element = $(this.element.getDocument().body);

    var stopper = this.element;

    if (this.options.wheelStops){
      this.addEvent('start', function(){
        stopper.addEvent('mousewheel', cancel);
      }, true);
      this.addEvent('complete', function(){
        stopper.removeEvent('mousewheel', cancel);
      }, true);
    }
  },

  set: function(){
    var now = Array.flatten(arguments);
    this.element.scrollTo(now[0], now[1]);
  },

  compute: function(from, to, delta){
    var now = [];
    var x = 2;
    x.times(function(i){
      now.push(Fx.compute(from[i], to[i], delta));
    });
    return now;
  },

  start: function(x, y){
    if (!this.check(arguments.callee, x, y)) return this;
    var offsetSize = this.element.getSize(), scrollSize = this.element.getScrollSize();
    var scroll = this.element.getScroll(), values = {x: x, y: y};
    for (var z in values){
      var max = scrollSize[z] - offsetSize[z];
      if ($chk(values[z])) values[z] = ($type(values[z]) == 'number') ? values[z].limit(0, max) : max;
      else values[z] = scroll[z];
      values[z] += this.options.offset[z];
    }
    return this.parent([scroll.x, scroll.y], [values.x, values.y]);
  },

  toTop: function(){
    return this.start(false, 0);
  },

  toLeft: function(){
    return this.start(0, false);
  },

  toRight: function(){
    return this.start('right', false);
  },

  toBottom: function(){
    return this.start(false, 'bottom');
  },

  toElement: function(el){
    var position = $(el).getPosition(this.element);
    return this.start(position.x, position.y);
  }

});


/*
Script: Fx.Elements.js
  Effect to change any number of CSS properties of any number of Elements.

License:
  MIT-style license.
*/

Fx.Elements = new Class({

  Extends: Fx.CSS,

  initialize: function(elements, options){
    this.elements = this.subject = $$(elements);
    this.parent(options);
  },

  compute: function(from, to, delta){
    var now = {};
    for (var i in from){
      var iFrom = from[i], iTo = to[i], iNow = now[i] = {};
      for (var p in iFrom) iNow[p] = this.parent(iFrom[p], iTo[p], delta);
    }
    return now;
  },

  set: function(now){
    for (var i in now){
      var iNow = now[i];
      for (var p in iNow) this.render(this.elements[i], p, iNow[p], this.options.unit);
    }
    return this;
  },

  start: function(obj){
    if (!this.check(arguments.callee, obj)) return this;
    var from = {}, to = {};
    for (var i in obj){
      var iProps = obj[i], iFrom = from[i] = {}, iTo = to[i] = {};
      for (var p in iProps){
        var parsed = this.prepare(this.elements[i], p, iProps[p]);
        iFrom[p] = parsed.from;
        iTo[p] = parsed.to;
      }
    }
    return this.parent(from, to);
  }

});

/*
Script: Drag.js
  The base Drag Class. Can be used to drag and resize Elements using mouse events.

License:
  MIT-style license.
*/

var Drag = new Class({

  Implements: [Events, Options],

  options: {/*
    onBeforeStart: $empty,
    onStart: $empty,
    onDrag: $empty,
    onCancel: $empty,
    onComplete: $empty,*/
    snap: 6,
    unit: 'px',
    grid: false,
    style: true,
    limit: false,
    handle: false,
    invert: false,
    preventDefault: false,
    modifiers: {x: 'left', y: 'top'}
  },

  initialize: function(){
    var params = Array.link(arguments, {'options': Object.type, 'element': $defined});
    this.element = $(params.element);
    this.document = this.element.getDocument();
    this.setOptions(params.options || {});
    var htype = $type(this.options.handle);
    this.handles = (htype == 'array' || htype == 'collection') ? $$(this.options.handle) : $(this.options.handle) || this.element;
    this.mouse = {'now': {}, 'pos': {}};
    this.value = {'start': {}, 'now': {}};

    this.selection = (Browser.Engine.trident) ? 'selectstart' : 'mousedown';

    this.bound = {
      start: this.start.bind(this),
      check: this.check.bind(this),
      drag: this.drag.bind(this),
      stop: this.stop.bind(this),
      cancel: this.cancel.bind(this),
      eventStop: $lambda(false)
    };
    this.attach();
  },

  attach: function(){
    this.handles.addEvent('mousedown', this.bound.start);
    return this;
  },

  detach: function(){
    this.handles.removeEvent('mousedown', this.bound.start);
    return this;
  },

  start: function(event){
    if (this.options.preventDefault) event.preventDefault();
    this.fireEvent('beforeStart', this.element);
    this.mouse.start = event.page;
    var limit = this.options.limit;
    this.limit = {'x': [], 'y': []};
    for (var z in this.options.modifiers){
      if (!this.options.modifiers[z]) continue;
      if (this.options.style) this.value.now[z] = this.element.getStyle(this.options.modifiers[z]).toInt();
      else this.value.now[z] = this.element[this.options.modifiers[z]];
      if (this.options.invert) this.value.now[z] *= -1;
      this.mouse.pos[z] = event.page[z] - this.value.now[z];
      if (limit && limit[z]){
        for (var i = 2; i--; i){
          if ($chk(limit[z][i])) this.limit[z][i] = $lambda(limit[z][i])();
        }
      }
    }
    if ($type(this.options.grid) == 'number') this.options.grid = {'x': this.options.grid, 'y': this.options.grid};
    this.document.addEvents({mousemove: this.bound.check, mouseup: this.bound.cancel});
    this.document.addEvent(this.selection, this.bound.eventStop);
  },

  check: function(event){
    if (this.options.preventDefault) event.preventDefault();
    var distance = Math.round(Math.sqrt(Math.pow(event.page.x - this.mouse.start.x, 2) + Math.pow(event.page.y - this.mouse.start.y, 2)));
    if (distance > this.options.snap){
      this.cancel();
      this.document.addEvents({
        mousemove: this.bound.drag,
        mouseup: this.bound.stop
      });
      this.fireEvent('start', this.element).fireEvent('snap', this.element);
    }
  },

  drag: function(event){
    if (this.options.preventDefault) event.preventDefault();
    this.mouse.now = event.page;
    for (var z in this.options.modifiers){
      if (!this.options.modifiers[z]) continue;
      this.value.now[z] = this.mouse.now[z] - this.mouse.pos[z];
      if (this.options.invert) this.value.now[z] *= -1;
      if (this.options.limit && this.limit[z]){
        if ($chk(this.limit[z][1]) && (this.value.now[z] > this.limit[z][1])){
          this.value.now[z] = this.limit[z][1];
        } else if ($chk(this.limit[z][0]) && (this.value.now[z] < this.limit[z][0])){
          this.value.now[z] = this.limit[z][0];
        }
      }
      if (this.options.grid[z]) this.value.now[z] -= (this.value.now[z] % this.options.grid[z]);
      if (this.options.style) this.element.setStyle(this.options.modifiers[z], this.value.now[z] + this.options.unit);
      else this.element[this.options.modifiers[z]] = this.value.now[z];
    }
    this.fireEvent('drag', this.element);
  },

  cancel: function(event){
    this.document.removeEvent('mousemove', this.bound.check);
    this.document.removeEvent('mouseup', this.bound.cancel);
    if (event){
      this.document.removeEvent(this.selection, this.bound.eventStop);
      this.fireEvent('cancel', this.element);
    }
  },

  stop: function(event){
    this.document.removeEvent(this.selection, this.bound.eventStop);
    this.document.removeEvent('mousemove', this.bound.drag);
    this.document.removeEvent('mouseup', this.bound.stop);
    if (event) this.fireEvent('complete', this.element);
  }

});

Element.implement({

  makeResizable: function(options){
    return new Drag(this, $merge({modifiers: {'x': 'width', 'y': 'height'}}, options));
  }

});

/*
Script: Drag.Move.js
  A Drag extension that provides support for the constraining of draggables to containers and droppables.

License:
  MIT-style license.
*/

Drag.Move = new Class({

  Extends: Drag,

  options: {
    droppables: [],
    container: false
  },

  initialize: function(element, options){
    this.parent(element, options);
    this.droppables = $$(this.options.droppables);
    this.container = $(this.options.container);
    if (this.container && $type(this.container) != 'element') this.container = $(this.container.getDocument().body);
    element = this.element;

    var current = element.getStyle('position');
    var position = (current != 'static') ? current : 'absolute';
    if (element.getStyle('left') == 'auto' || element.getStyle('top') == 'auto') element.position(element.getPosition(element.offsetParent));

    element.setStyle('position', position);

    this.addEvent('start', function(){
      this.checkDroppables();
    }, true);
  },

  start: function(event){
    if (this.container){
      var el = this.element, cont = this.container, ccoo = cont.getCoordinates(el.offsetParent), cps = {}, ems = {};

      ['top', 'right', 'bottom', 'left'].each(function(pad){
        cps[pad] = cont.getStyle('padding-' + pad).toInt();
        ems[pad] = el.getStyle('margin-' + pad).toInt();
      }, this);

      var width = el.offsetWidth + ems.left + ems.right, height = el.offsetHeight + ems.top + ems.bottom;
      var x = [ccoo.left + cps.left, ccoo.right - cps.right - width];
      var y = [ccoo.top + cps.top, ccoo.bottom - cps.bottom - height];

      this.options.limit = {x: x, y: y};
    }
    this.parent(event);
  },

  checkAgainst: function(el){
    el = el.getCoordinates();
    var now = this.mouse.now;
    return (now.x > el.left && now.x < el.right && now.y < el.bottom && now.y > el.top);
  },

  checkDroppables: function(){
    var overed = this.droppables.filter(this.checkAgainst, this).getLast();
    if (this.overed != overed){
      if (this.overed) this.fireEvent('leave', [this.element, this.overed]);
      if (overed){
        this.overed = overed;
        this.fireEvent('enter', [this.element, overed]);
      } else {
        this.overed = null;
      }
    }
  },

  drag: function(event){
    this.parent(event);
    if (this.droppables.length) this.checkDroppables();
  },

  stop: function(event){
    this.checkDroppables();
    this.fireEvent('drop', [this.element, this.overed]);
    this.overed = null;
    return this.parent(event);
  }

});

Element.implement({

  makeDraggable: function(options){
    return new Drag.Move(this, options);
  }

});


/*
Script: Hash.Cookie.js
  Class for creating, reading, and deleting Cookies in JSON format.

License:
  MIT-style license.
*/

Hash.Cookie = new Class({

  Extends: Cookie,

  options: {
    autoSave: true
  },

  initialize: function(name, options){
    this.parent(name, options);
    this.load();
  },

  save: function(){
    var value = JSON.encode(this.hash);
    if (!value || value.length > 4096) return false; //cookie would be truncated!
    if (value == '{}') this.dispose();
    else this.write(value);
    return true;
  },

  load: function(){
    this.hash = new Hash(JSON.decode(this.read(), true));
    return this;
  }

});

Hash.Cookie.implement((function(){

  var methods = {};

  Hash.each(Hash.prototype, function(method, name){
    methods[name] = function(){
      var value = method.apply(this.hash, arguments);
      if (this.options.autoSave) this.save();
      return value;
    };
  });

  return methods;

})());

/*
Script: Color.js
  Class for creating and manipulating colors in JavaScript. Supports HSB -> RGB Conversions and vice versa.

License:
  MIT-style license.
*/

var Color = new Native({

  initialize: function(color, type){
    if (arguments.length >= 3){
      type = "rgb"; color = Array.slice(arguments, 0, 3);
    } else if (typeof color == 'string'){
      if (color.match(/rgb/)) color = color.rgbToHex().hexToRgb(true);
      else if (color.match(/hsb/)) color = color.hsbToRgb();
      else color = color.hexToRgb(true);
    }
    type = type || 'rgb';
    switch (type){
      case 'hsb':
        var old = color;
        color = color.hsbToRgb();
        color.hsb = old;
      break;
      case 'hex': color = color.hexToRgb(true); break;
    }
    color.rgb = color.slice(0, 3);
    color.hsb = color.hsb || color.rgbToHsb();
    color.hex = color.rgbToHex();
    return $extend(color, this);
  }

});

Color.implement({

  mix: function(){
    var colors = Array.slice(arguments);
    var alpha = ($type(colors.getLast()) == 'number') ? colors.pop() : 50;
    var rgb = this.slice();
    colors.each(function(color){
      color = new Color(color);
      for (var i = 0; i < 3; i++) rgb[i] = Math.round((rgb[i] / 100 * (100 - alpha)) + (color[i] / 100 * alpha));
    });
    return new Color(rgb, 'rgb');
  },

  invert: function(){
    return new Color(this.map(function(value){
      return 255 - value;
    }));
  },

  setHue: function(value){
    return new Color([value, this.hsb[1], this.hsb[2]], 'hsb');
  },

  setSaturation: function(percent){
    return new Color([this.hsb[0], percent, this.hsb[2]], 'hsb');
  },

  setBrightness: function(percent){
    return new Color([this.hsb[0], this.hsb[1], percent], 'hsb');
  }

});

function $RGB(r, g, b){
  return new Color([r, g, b], 'rgb');
};

function $HSB(h, s, b){
  return new Color([h, s, b], 'hsb');
};

function $HEX(hex){
  return new Color(hex, 'hex');
};

Array.implement({

  rgbToHsb: function(){
    var red = this[0], green = this[1], blue = this[2];
    var hue, saturation, brightness;
    var max = Math.max(red, green, blue), min = Math.min(red, green, blue);
    var delta = max - min;
    brightness = max / 255;
    saturation = (max != 0) ? delta / max : 0;
    if (saturation == 0){
      hue = 0;
    } else {
      var rr = (max - red) / delta;
      var gr = (max - green) / delta;
      var br = (max - blue) / delta;
      if (red == max) hue = br - gr;
      else if (green == max) hue = 2 + rr - br;
      else hue = 4 + gr - rr;
      hue /= 6;
      if (hue < 0) hue++;
    }
    return [Math.round(hue * 360), Math.round(saturation * 100), Math.round(brightness * 100)];
  },

  hsbToRgb: function(){
    var br = Math.round(this[2] / 100 * 255);
    if (this[1] == 0){
      return [br, br, br];
    } else {
      var hue = this[0] % 360;
      var f = hue % 60;
      var p = Math.round((this[2] * (100 - this[1])) / 10000 * 255);
      var q = Math.round((this[2] * (6000 - this[1] * f)) / 600000 * 255);
      var t = Math.round((this[2] * (6000 - this[1] * (60 - f))) / 600000 * 255);
      switch (Math.floor(hue / 60)){
        case 0: return [br, t, p];
        case 1: return [q, br, p];
        case 2: return [p, br, t];
        case 3: return [p, q, br];
        case 4: return [t, p, br];
        case 5: return [br, p, q];
      }
    }
    return false;
  }

});

String.implement({

  rgbToHsb: function(){
    var rgb = this.match(/\d{1,3}/g);
    return (rgb) ? hsb.rgbToHsb() : null;
  },

  hsbToRgb: function(){
    var hsb = this.match(/\d{1,3}/g);
    return (hsb) ? hsb.hsbToRgb() : null;
  }

});


/*
Script: Group.js
  Class for monitoring collections of events

License:
  MIT-style license.
*/

var Group = new Class({

  initialize: function(){
    this.instances = Array.flatten(arguments);
    this.events = {};
    this.checker = {};
  },

  addEvent: function(type, fn){
    this.checker[type] = this.checker[type] || {};
    this.events[type] = this.events[type] || [];
    if (this.events[type].contains(fn)) return false;
    else this.events[type].push(fn);
    this.instances.each(function(instance, i){
      instance.addEvent(type, this.check.bind(this, [type, instance, i]));
    }, this);
    return this;
  },

  check: function(type, instance, i){
    this.checker[type][i] = true;
    var every = this.instances.every(function(current, j){
      return this.checker[type][j] || false;
    }, this);
    if (!every) return;
    this.checker[type] = {};
    this.events[type].each(function(event){
      event.call(this, this.instances, instance);
    }, this);
  }

});


/*
Script: Assets.js
  Provides methods to dynamically load JavaScript, CSS, and Image files into the document.

License:
  MIT-style license.
*/

var Asset = new Hash({

  javascript: function(source, properties){
    properties = $extend({
      onload: $empty,
      document: document,
      check: $lambda(true)
    }, properties);

    var script = new Element('script', {'src': source, 'type': 'text/javascript'});

    var load = properties.onload.bind(script), check = properties.check, doc = properties.document;
    delete properties.onload; delete properties.check; delete properties.document;

    script.addEvents({
      load: load,
      readystatechange: function(){
        if (['loaded', 'complete'].contains(this.readyState)) load();
      }
    }).setProperties(properties);


    if (Browser.Engine.webkit419) var checker = (function(){
      if (!$try(check)) return;
      $clear(checker);
      load();
    }).periodical(50);

    return script.inject(doc.head);
  },

  css: function(source, properties){
    return new Element('link', $merge({
      'rel': 'stylesheet', 'media': 'screen', 'type': 'text/css', 'href': source
    }, properties)).inject(document.head);
  },

  image: function(source, properties){
    properties = $merge({
      'onload': $empty,
      'onabort': $empty,
      'onerror': $empty
    }, properties);
    var image = new Image();
    var element = $(image) || new Element('img');
    ['load', 'abort', 'error'].each(function(name){
      var type = 'on' + name;
      var event = properties[type];
      delete properties[type];
      image[type] = function(){
        if (!image) return;
        if (!element.parentNode){
          element.width = image.width;
          element.height = image.height;
        }
        image = image.onload = image.onabort = image.onerror = null;
        event.delay(1, element, element);
        element.fireEvent(name, element, 1);
      };
    });
    image.src = element.src = source;
    if (image && image.complete) image.onload.delay(1);
    return element.setProperties(properties);
  },

  images: function(sources, options){
    options = $merge({
      onComplete: $empty,
      onProgress: $empty
    }, options);
    if (!sources.push) sources = [sources];
    var images = [];
    var counter = 0;
    sources.each(function(source){
      var img = new Asset.image(source, {
        'onload': function(){
          options.onProgress.call(this, counter, sources.indexOf(source));
          counter++;
          if (counter == sources.length) options.onComplete();
        }
      });
      images.push(img);
    });
    return new Elements(images);
  }

});

/*
Script: Sortables.js
  Class for creating a drag and drop sorting interface for lists of items.

License:
  MIT-style license.
*/

var Sortables = new Class({

  Implements: [Events, Options],

  options: {/*
    onSort: $empty,
    onStart: $empty,
    onComplete: $empty,*/
    snap: 4,
    opacity: 1,
    clone: false,
    revert: false,
    handle: false,
    constrain: false
  },

  initialize: function(lists, options){
    this.setOptions(options);
    this.elements = [];
    this.lists = [];
    this.idle = true;

    this.addLists($$($(lists) || lists));
    if (!this.options.clone) this.options.revert = false;
    if (this.options.revert) this.effect = new Fx.Morph(null, $merge({duration: 250, link: 'cancel'}, this.options.revert));
  },

  attach: function(){
    this.addLists(this.lists);
    return this;
  },

  detach: function(){
    this.lists = this.removeLists(this.lists);
    return this;
  },

  addItems: function(){
    Array.flatten(arguments).each(function(element){
      this.elements.push(element);
      var start = element.retrieve('sortables:start', this.start.bindWithEvent(this, element));
      (this.options.handle ? element.getElement(this.options.handle) || element : element).addEvent('mousedown', start);
    }, this);
    return this;
  },

  addLists: function(){
    Array.flatten(arguments).each(function(list){
      this.lists.push(list);
      this.addItems(list.getChildren());
    }, this);
    return this;
  },

  removeItems: function(){
    var elements = [];
    Array.flatten(arguments).each(function(element){
      elements.push(element);
      this.elements.erase(element);
      var start = element.retrieve('sortables:start');
      (this.options.handle ? element.getElement(this.options.handle) || element : element).removeEvent('mousedown', start);
    }, this);
    return $$(elements);
  },

  removeLists: function(){
    var lists = [];
    Array.flatten(arguments).each(function(list){
      lists.push(list);
      this.lists.erase(list);
      this.removeItems(list.getChildren());
    }, this);
    return $$(lists);
  },

  getClone: function(event, element){
    if (!this.options.clone) return new Element('div').inject(document.body);
    if ($type(this.options.clone) == 'function') return this.options.clone.call(this, event, element, this.list);
    return element.clone(true).setStyles({
      'margin': '0px',
      'position': 'absolute',
      'visibility': 'hidden',
      'width': element.getStyle('width')
    }).inject(this.list).position(element.getPosition(element.getOffsetParent()));
  },

  getDroppables: function(){
    var droppables = this.list.getChildren();
    if (!this.options.constrain) droppables = this.lists.concat(droppables).erase(this.list);
    return droppables.erase(this.clone).erase(this.element);
  },

  insert: function(dragging, element){
    var where = 'inside';
    if (this.lists.contains(element)){
      this.list = element;
      this.drag.droppables = this.getDroppables();
    } else {
      where = this.element.getAllPrevious().contains(element) ? 'before' : 'after';
    }
    this.element.inject(element, where);
    this.fireEvent('sort', [this.element, this.clone]);
  },

  start: function(event, element){
    if (!this.idle) return;
    this.idle = false;
    this.element = element;
    this.opacity = element.get('opacity');
    this.list = element.getParent();
    this.clone = this.getClone(event, element);

    this.drag = new Drag.Move(this.clone, {
      snap: this.options.snap,
      container: this.options.constrain && this.element.getParent(),
      droppables: this.getDroppables(),
      onSnap: function(){
        event.stop();
        this.clone.setStyle('visibility', 'visible');
        this.element.set('opacity', this.options.opacity || 0);
        this.fireEvent('start', [this.element, this.clone]);
      }.bind(this),
      onEnter: this.insert.bind(this),
      onCancel: this.reset.bind(this),
      onComplete: this.end.bind(this)
    });

    this.clone.inject(this.element, 'before');
    this.drag.start(event);
  },

  end: function(){
    this.drag.detach();
    this.element.set('opacity', this.opacity);
    if (this.effect){
      var dim = this.element.getStyles('width', 'height');
      var pos = this.clone.computePosition(this.element.getPosition(this.clone.offsetParent));
      this.effect.element = this.clone;
      this.effect.start({
        top: pos.top,
        left: pos.left,
        width: dim.width,
        height: dim.height,
        opacity: 0.25
      }).chain(this.reset.bind(this));
    } else {
      this.reset();
    }
  },

  reset: function(){
    this.idle = true;
    this.clone.destroy();
    this.fireEvent('complete', this.element);
  },

  serialize: function(){
    var params = Array.link(arguments, {modifier: Function.type, index: $defined});
    var serial = this.lists.map(function(list){
      return list.getChildren().map(params.modifier || function(element){
        return element.get('id');
      }, this);
    }, this);

    var index = params.index;
    if (this.lists.length == 1) index = 0;
    return $chk(index) && index >= 0 && index < this.lists.length ? serial[index] : serial;
  }

});

/*
Script: Tips.js
  Class for creating nice tips that follow the mouse cursor when hovering an element.

License:
  MIT-style license.
*/

var Tips = new Class({

  Implements: [Events, Options],

  options: {
    onShow: function(tip){
      tip.setStyle('visibility', 'visible');
    },
    onHide: function(tip){
      tip.setStyle('visibility', 'hidden');
    },
    showDelay: 100,
    hideDelay: 100,
    className: null,
    offsets: {x: 16, y: 16},
    fixed: false
  },

  initialize: function(){
    var params = Array.link(arguments, {options: Object.type, elements: $defined});
    this.setOptions(params.options || null);

    this.tip = new Element('div').inject(document.body);

    if (this.options.className) this.tip.addClass(this.options.className);

    var top = new Element('div', {'class': 'tip-top'}).inject(this.tip);
    this.container = new Element('div', {'class': 'tip'}).inject(this.tip);
    var bottom = new Element('div', {'class': 'tip-bottom'}).inject(this.tip);

    this.tip.setStyles({position: 'absolute', top: 0, left: 0, visibility: 'hidden'});

    if (params.elements) this.attach(params.elements);
  },

  attach: function(elements){
    $$(elements).each(function(element){
      var title = element.retrieve('tip:title', element.get('title'));
      var text = element.retrieve('tip:text', element.get('rel') || element.get('href'));
      var enter = element.retrieve('tip:enter', this.elementEnter.bindWithEvent(this, element));
      var leave = element.retrieve('tip:leave', this.elementLeave.bindWithEvent(this, element));
      element.addEvents({mouseenter: enter, mouseleave: leave});
      if (!this.options.fixed){
        var move = element.retrieve('tip:move', this.elementMove.bindWithEvent(this, element));
        element.addEvent('mousemove', move);
      }
      element.store('tip:native', element.get('title'));
      element.erase('title');
    }, this);
    return this;
  },

  detach: function(elements){
    $$(elements).each(function(element){
      element.removeEvent('mouseenter', element.retrieve('tip:enter') || $empty);
      element.removeEvent('mouseleave', element.retrieve('tip:leave') || $empty);
      element.removeEvent('mousemove', element.retrieve('tip:move') || $empty);
      element.eliminate('tip:enter').eliminate('tip:leave').eliminate('tip:move');
      var original = element.retrieve('tip:native');
      if (original) element.set('title', original);
    });
    return this;
  },

  elementEnter: function(event, element){

    $A(this.container.childNodes).each(Element.dispose);

    var title = element.retrieve('tip:title');

    if (title){
      this.titleElement = new Element('div', {'class': 'tip-title'}).inject(this.container);
      this.fill(this.titleElement, title);
    }

    var text = element.retrieve('tip:text');
    if (text){
      this.textElement = new Element('div', {'class': 'tip-text'}).inject(this.container);
      this.fill(this.textElement, text);
    }

    this.timer = $clear(this.timer);
    this.timer = this.show.delay(this.options.showDelay, this);

    this.position((!this.options.fixed) ? event : {page: element.getPosition()});
  },

  elementLeave: function(event){
    $clear(this.timer);
    this.timer = this.hide.delay(this.options.hideDelay, this);
  },

  elementMove: function(event){
    this.position(event);
  },

  position: function(event){
    var size = window.getSize(), scroll = window.getScroll();
    var tip = {x: this.tip.offsetWidth, y: this.tip.offsetHeight};
    var props = {x: 'left', y: 'top'};
    for (var z in props){
      var pos = event.page[z] + this.options.offsets[z];
      if ((pos + tip[z] - scroll[z]) > size[z]) pos = event.page[z] - this.options.offsets[z] - tip[z];
      this.tip.setStyle(props[z], pos);
    }
  },

  fill: function(element, contents){
    (typeof contents == 'string') ? element.set('html', contents) : element.adopt(contents);
  },

  show: function(){
    this.fireEvent('show', this.tip);
  },

  hide: function(){
    this.fireEvent('hide', this.tip);
  }

});

/*
Script: SmoothScroll.js
  Class for creating a smooth scrolling effect to all internal links on the page.

License:
  MIT-style license.
*/

var SmoothScroll = new Class({

  Extends: Fx.Scroll,

  initialize: function(options, context){
    context = context || document;
    var doc = context.getDocument(), win = context.getWindow();
    this.parent(doc, options);
    this.links = (this.options.links) ? $$(this.options.links) : $$(doc.links);
    var location = win.location.href.match(/^[^#]*/)[0] + '#';
    this.links.each(function(link){
      if (link.href.indexOf(location) != 0) return;
      var anchor = link.href.substr(location.length);
      if (anchor && $(anchor)) this.useLink(link, anchor);
    }, this);
    if (!Browser.Engine.webkit419) this.addEvent('complete', function(){
      win.location.hash = this.anchor;
    }, true);
  },

  useLink: function(link, anchor){
    link.addEvent('click', function(event){
      this.anchor = anchor;
      this.toElement(anchor);
      event.stop();
    }.bind(this));
  }

});

/*
Script: Slider.js
  Class for creating horizontal and vertical slider controls.

License:
  MIT-style license.
*/

var Slider = new Class({

  Implements: [Events, Options],

  options: {/*
    onChange: $empty,
    onComplete: $empty,*/
    onTick: function(position){
      if(this.options.snap) position = this.toPosition(this.step);
      this.knob.setStyle(this.property, position);
    },
    snap: false,
    offset: 0,
    range: false,
    wheel: false,
    steps: 100,
    mode: 'horizontal'
  },

  initialize: function(element, knob, options){
    this.setOptions(options);
    this.element = $(element);
    this.knob = $(knob);
    this.previousChange = this.previousEnd = this.step = -1;
    this.element.addEvent('mousedown', this.clickedElement.bind(this));
    if (this.options.wheel) this.element.addEvent('mousewheel', this.scrolledElement.bindWithEvent(this));
    var offset, limit = {}, modifiers = {'x': false, 'y': false};
    switch (this.options.mode){
      case 'vertical':
        this.axis = 'y';
        this.property = 'top';
        offset = 'offsetHeight';
        break;
      case 'horizontal':
        this.axis = 'x';
        this.property = 'left';
        offset = 'offsetWidth';
    }
    this.half = this.knob[offset] / 2;
    this.full = this.element[offset] - this.knob[offset] + (this.options.offset * 2);
    this.min = $chk(this.options.range[0]) ? this.options.range[0] : 0;
    this.max = $chk(this.options.range[1]) ? this.options.range[1] : this.options.steps;
    this.range = this.max - this.min;
    this.steps = this.options.steps || this.full;
    this.stepSize = Math.abs(this.range) / this.steps;
    this.stepWidth = this.stepSize * this.full / Math.abs(this.range) ;

    this.knob.setStyle('position', 'relative').setStyle(this.property, - this.options.offset);
    modifiers[this.axis] = this.property;
    limit[this.axis] = [- this.options.offset, this.full - this.options.offset];
    this.drag = new Drag(this.knob, {
      snap: 0,
      limit: limit,
      modifiers: modifiers,
      onDrag: this.draggedKnob.bind(this),
      onStart: this.draggedKnob.bind(this),
      onComplete: function(){
        this.draggedKnob();
        this.end();
      }.bind(this)
    });
    if (this.options.snap) {
      this.drag.options.grid = Math.ceil(this.stepWidth);
      this.drag.options.limit[this.axis][1] = this.full;
    }
  },

  set: function(step){
    if (!((this.range > 0) ^ (step < this.min))) step = this.min;
    if (!((this.range > 0) ^ (step > this.max))) step = this.max;

    this.step = Math.round(step);
    this.checkStep();
    this.end();
    this.fireEvent('tick', this.toPosition(this.step));
    return this;
  },

  clickedElement: function(event){
    var dir = this.range < 0 ? -1 : 1;
    var position = event.page[this.axis] - this.element.getPosition()[this.axis] - this.half;
    position = position.limit(-this.options.offset, this.full -this.options.offset);

    this.step = Math.round(this.min + dir * this.toStep(position));
    this.checkStep();
    this.end();
    this.fireEvent('tick', position);
  },

  scrolledElement: function(event){
    var mode = (this.options.mode == 'horizontal') ? (event.wheel < 0) : (event.wheel > 0);
    this.set(mode ? this.step - this.stepSize : this.step + this.stepSize);
    event.stop();
  },

  draggedKnob: function(){
    var dir = this.range < 0 ? -1 : 1;
    var position = this.drag.value.now[this.axis];
    position = position.limit(-this.options.offset, this.full -this.options.offset);
    this.step = Math.round(this.min + dir * this.toStep(position));
    this.checkStep();
  },

  checkStep: function(){
    if (this.previousChange != this.step){
      this.previousChange = this.step;
      this.fireEvent('change', this.step);
    }
  },

  end: function(){
    if (this.previousEnd !== this.step){
      this.previousEnd = this.step;
      this.fireEvent('complete', this.step + '');
    }
  },

  toStep: function(position){
    var step = (position + this.options.offset) * this.stepSize / this.full * this.steps;
    return this.options.steps ? Math.round(step -= step % this.stepSize) : step;
  },

  toPosition: function(step){
    return (this.full * Math.abs(this.min - step)) / (this.steps * this.stepSize) - this.options.offset;
  }

});

/*
Script: Scroller.js
  Class which scrolls the contents of any Element (including the window) when the mouse reaches the Element's boundaries.

License:
  MIT-style license.
*/

var Scroller = new Class({

  Implements: [Events, Options],

  options: {
    area: 20,
    velocity: 1,
    onChange: function(x, y){
      this.element.scrollTo(x, y);
    }
  },

  initialize: function(element, options){
    this.setOptions(options);
    this.element = $(element);
    this.listener = ($type(this.element) != 'element') ? $(this.element.getDocument().body) : this.element;
    this.timer = null;
    this.coord = this.getCoords.bind(this);
  },

  start: function(){
    this.listener.addEvent('mousemove', this.coord);
  },

  stop: function(){
    this.listener.removeEvent('mousemove', this.coord);
    this.timer = $clear(this.timer);
  },

  getCoords: function(event){
    this.page = (this.listener.get('tag') == 'body') ? event.client : event.page;
    if (!this.timer) this.timer = this.scroll.periodical(50, this);
  },

  scroll: function(){
    var size = this.element.getSize(), scroll = this.element.getScroll(), pos = this.element.getPosition(), change = {'x': 0, 'y': 0};
    for (var z in this.page){
      if (this.page[z] < (this.options.area + pos[z]) && scroll[z] != 0)
        change[z] = (this.page[z] - this.options.area - pos[z]) * this.options.velocity;
      else if (this.page[z] + this.options.area > (size[z] + pos[z]) && size[z] + size[z] != scroll[z])
        change[z] = (this.page[z] - size[z] + this.options.area - pos[z]) * this.options.velocity;
    }
    if (change.y || change.x) this.fireEvent('change', [scroll.x + change.x, scroll.y + change.y]);
  }

});

/*
Script: Accordion.js
  An Fx.Elements extension which allows you to easily create accordion type controls.

License:
  MIT-style license.
*/

var Accordion = new Class({

  Extends: Fx.Elements,

  options: {/*
    onActive: $empty,
    onBackground: $empty,*/
    display: 0,
    show: false,
    height: true,
    width: false,
    opacity: true,
    fixedHeight: false,
    fixedWidth: false,
    wait: false,
    alwaysHide: false
  },

  initialize: function(){
    var params = Array.link(arguments, {'container': Element.type, 'options': Object.type, 'togglers': $defined, 'elements': $defined});
    this.parent(params.elements, params.options);
    this.togglers = $$(params.togglers);
    this.container = $(params.container);
    this.previous = -1;
    if (this.options.alwaysHide) this.options.wait = true;
    if ($chk(this.options.show)){
      this.options.display = false;
      this.previous = this.options.show;
    }
    if (this.options.start){
      this.options.display = false;
      this.options.show = false;
    }
    this.effects = {};
    if (this.options.opacity) this.effects.opacity = 'fullOpacity';
    if (this.options.width) this.effects.width = this.options.fixedWidth ? 'fullWidth' : 'offsetWidth';
    if (this.options.height) this.effects.height = this.options.fixedHeight ? 'fullHeight' : 'scrollHeight';
    for (var i = 0, l = this.togglers.length; i < l; i++) this.addSection(this.togglers[i], this.elements[i]);
    this.elements.each(function(el, i){
      if (this.options.show === i){
        this.fireEvent('active', [this.togglers[i], el]);
      } else {
        for (var fx in this.effects) el.setStyle(fx, 0);
      }
    }, this);
    if ($chk(this.options.display)) this.display(this.options.display);
  },

  addSection: function(toggler, element, pos){
    toggler = $(toggler);
    element = $(element);
    var test = this.togglers.contains(toggler);
    var len = this.togglers.length;
    this.togglers.include(toggler);
    this.elements.include(element);
    if (len && (!test || pos)){
      pos = $pick(pos, len - 1);
      toggler.inject(this.togglers[pos], 'before');
      element.inject(toggler, 'after');
    } else if (this.container && !test){
      toggler.inject(this.container);
      element.inject(this.container);
    }
    var idx = this.togglers.indexOf(toggler);
    toggler.addEvent('click', this.display.bind(this, idx));
    if (this.options.height) element.setStyles({'padding-top': 0, 'border-top': 'none', 'padding-bottom': 0, 'border-bottom': 'none'});
    if (this.options.width) element.setStyles({'padding-left': 0, 'border-left': 'none', 'padding-right': 0, 'border-right': 'none'});
    element.fullOpacity = 1;
    if (this.options.fixedWidth) element.fullWidth = this.options.fixedWidth;
    if (this.options.fixedHeight) element.fullHeight = this.options.fixedHeight;
    element.setStyle('overflow', 'hidden');
    if (!test){
      for (var fx in this.effects) element.setStyle(fx, 0);
    }
    return this;
  },

  display: function(index){
    index = ($type(index) == 'element') ? this.elements.indexOf(index) : index;
    if ((this.timer && this.options.wait) || (index === this.previous && !this.options.alwaysHide)) return this;
    this.previous = index;
    var obj = {};
    this.elements.each(function(el, i){
      obj[i] = {};
      var hide = (i != index) || (this.options.alwaysHide && (el.offsetHeight > 0));
      this.fireEvent(hide ? 'background' : 'active', [this.togglers[i], el]);
      for (var fx in this.effects) obj[i][fx] = hide ? 0 : el[this.effects[fx]];
    }, this);
    return this.start(obj);
  }

});