// MooTools: the javascript framework.
// Load this file's selection again by visiting: http://mootools.net/more/6a0fb6f6380168a26296147f9c9ba3c3 
// Or build this file again with packager using: packager build More/Element.Position More/Fx.Slide More/Slider More/Sortables
/*
---

script: More.js

name: More

description: MooTools More

license: MIT-style license

authors:
  - Guillermo Rauch
  - Thomas Aylott
  - Scott Kyle
  - Arian Stolwijk
  - Tim Wienk
  - Christoph Pojer
  - Aaron Newton

requires:
  - Core/MooTools

provides: [MooTools.More]

...
*/

MooTools.More = {
	'version': '1.3.0.1',
	'build': '6dce99bed2792dffcbbbb4ddc15a1fb9a41994b5'
};


/*
---

script: Element.Measure.js

name: Element.Measure

description: Extends the Element native object to include methods useful in measuring dimensions.

credits: "Element.measure / .expose methods by Daniel Steigerwald License: MIT-style license. Copyright: Copyright (c) 2008 Daniel Steigerwald, daniel.steigerwald.cz"

license: MIT-style license

authors:
  - Aaron Newton

requires:
  - Core/Element.Style
  - Core/Element.Dimensions
  - /MooTools.More

provides: [Element.Measure]

...
*/

(function(){

var getStylesList = function(styles, planes){
	var list = [];
	Object.each(planes, function(directions){
		Object.each(directions, function(edge){
			styles.each(function(style){
				list.push(style + '-' + edge + (style == 'border' ? '-width' : ''));
			});
		});
	});
	return list;
};

var calculateEdgeSize = function(edge, styles){
	var total = 0;
	Object.each(styles, function(value, style){
		if (style.test(edge)) total = total + value.toInt();
	});
	return total;
};


Element.implement({

	measure: function(fn){
		var visibility = function(el){
			return !!(!el || el.offsetHeight || el.offsetWidth);
		};
		if (visibility(this)) return fn.apply(this);
		var parent = this.getParent(),
			restorers = [],
			toMeasure = [];
		while (!visibility(parent) && parent != document.body){
			toMeasure.push(parent.expose());
			parent = parent.getParent();
		}
		var restore = this.expose();
		var result = fn.apply(this);
		restore();
		toMeasure.each(function(restore){
			restore();
		});
		return result;
	},

	expose: function(){
		if (this.getStyle('display') != 'none') return function(){};
		var before = this.style.cssText;
		this.setStyles({
			display: 'block',
			position: 'absolute',
			visibility: 'hidden'
		});
		return function(){
			this.style.cssText = before;
		}.bind(this);
	},

	getDimensions: function(options){
		options = Object.merge({computeSize: false}, options);
		var dim = {x: 0, y: 0};

		var getSize = function(el, options){
			return (options.computeSize) ? el.getComputedSize(options) : el.getSize();
		};

		var parent = this.getParent('body');

		if (parent && this.getStyle('display') == 'none'){
			dim = this.measure(function(){
				return getSize(this, options);
			});
		} else if (parent){
			try { //safari sometimes crashes here, so catch it
				dim = getSize(this, options);
			}catch(e){}
		}

		return Object.append(dim, (dim.x || dim.x === 0) ? {
				width: dim.x,
				height: dim.y
			} : {
				x: dim.width,
				y: dim.height
			}
		);
	},

	getComputedSize: function(options){
		//<1.2compat>
		//legacy support for my stupid spelling error
		if (options && options.plains) options.planes = options.plains;
		//</1.2compat>

		options = Object.merge({
			styles: ['padding','border'],
			planes: {
				height: ['top','bottom'],
				width: ['left','right']
			},
			mode: 'both'
		}, options);

		var styles = {},
			size = {width: 0, height: 0};

		if (options.mode == 'vertical'){
			delete size.width;
			delete options.planes.width;
		} else if (options.mode == 'horizontal'){
			delete size.height;
			delete options.planes.height;
		}


		getStylesList(options.styles, options.planes).each(function(style){
			styles[style] = this.getStyle(style).toInt();
		}, this);

		Object.each(options.planes, function(edges, plane){

			var capitalized = plane.capitalize();
			styles[plane] = this.getStyle(plane).toInt();
			size['total' + capitalized] = styles[plane];

			edges.each(function(edge){
				var edgesize = calculateEdgeSize(edge, styles);
				size['computed' + edge.capitalize()] = edgesize;
				size['total' + capitalized] += edgesize;
			});

		}, this);

		return Object.append(size, styles);
	}

});

})();


/*
---

script: Element.Position.js

name: Element.Position

description: Extends the Element native object to include methods useful positioning elements relative to others.

license: MIT-style license

authors:
  - Aaron Newton

requires:
  - Core/Element.Dimensions
  - /Element.Measure

provides: [Element.Position]

...
*/

(function(){

var original = Element.prototype.position;

Element.implement({

	position: function(options){
		//call original position if the options are x/y values
		if (options && (options.x != null || options.y != null)){
			return original ? original.apply(this, arguments) : this;
		}

		Object.each(options || {}, function(v, k){
			if (v == null) delete options[k];
		});

		options = Object.merge({
			// minimum: { x: 0, y: 0 },
			// maximum: { x: 0, y: 0},
			relativeTo: document.body,
			position: {
				x: 'center', //left, center, right
				y: 'center' //top, center, bottom
			},
			offset: {x: 0, y: 0}/*,
			edge: false,
			returnPos: false,
			relFixedPosition: false,
			ignoreMargins: false,
			ignoreScroll: false,
			allowNegative: false*/
		}, options);

		//compute the offset of the parent positioned element if this element is in one
		var parentOffset = {x: 0, y: 0},
			parentPositioned = false;

		/* dollar around getOffsetParent should not be necessary, but as it does not return
		 * a mootools extended element in IE, an error occurs on the call to expose. See:
		 * http://mootools.lighthouseapp.com/projects/2706/tickets/333-element-getoffsetparent-inconsistency-between-ie-and-other-browsers */
		var offsetParent = this.measure(function(){
			return document.id(this.getOffsetParent());
		});
		if (offsetParent && offsetParent != this.getDocument().body){
			parentOffset = offsetParent.measure(function(){
				return this.getPosition();
			});
			parentPositioned = offsetParent != document.id(options.relativeTo);
			options.offset.x = options.offset.x - parentOffset.x;
			options.offset.y = options.offset.y - parentOffset.y;
		}

		//upperRight, bottomRight, centerRight, upperLeft, bottomLeft, centerLeft
		//topRight, topLeft, centerTop, centerBottom, center
		var fixValue = function(option){
			if (typeOf(option) != 'string') return option;
			option = option.toLowerCase();
			var val = {};

			if (option.test('left')){
				val.x = 'left';
			} else if (option.test('right')){
				val.x = 'right';
			} else {
				val.x = 'center';
			}

			if (option.test('upper') || option.test('top')){
				val.y = 'top';
			} else if (option.test('bottom')){
				val.y = 'bottom';
			} else {
				val.y = 'center';
			}

			return val;
		};

		options.edge = fixValue(options.edge);
		options.position = fixValue(options.position);
		if (!options.edge){
			if (options.position.x == 'center' && options.position.y == 'center') options.edge = {x:'center', y:'center'};
			else options.edge = {x:'left', y:'top'};
		}

		this.setStyle('position', 'absolute');
		var rel = document.id(options.relativeTo) || document.body,
				calc = rel == document.body ? window.getScroll() : rel.getPosition(),
				top = calc.y, left = calc.x;

		var dim = this.getDimensions({
			computeSize: true,
			styles:['padding', 'border','margin']
		});

		var pos = {},
			prefY = options.offset.y,
			prefX = options.offset.x,
			winSize = window.getSize();

		switch(options.position.x){
			case 'left':
				pos.x = left + prefX;
				break;
			case 'right':
				pos.x = left + prefX + rel.offsetWidth;
				break;
			default: //center
				pos.x = left + ((rel == document.body ? winSize.x : rel.offsetWidth)/2) + prefX;
				break;
		}

		switch(options.position.y){
			case 'top':
				pos.y = top + prefY;
				break;
			case 'bottom':
				pos.y = top + prefY + rel.offsetHeight;
				break;
			default: //center
				pos.y = top + ((rel == document.body ? winSize.y : rel.offsetHeight)/2) + prefY;
				break;
		}

		if (options.edge){
			var edgeOffset = {};

			switch(options.edge.x){
				case 'left':
					edgeOffset.x = 0;
					break;
				case 'right':
					edgeOffset.x = -dim.x-dim.computedRight-dim.computedLeft;
					break;
				default: //center
					edgeOffset.x = -(dim.totalWidth/2);
					break;
			}

			switch(options.edge.y){
				case 'top':
					edgeOffset.y = 0;
					break;
				case 'bottom':
					edgeOffset.y = -dim.y-dim.computedTop-dim.computedBottom;
					break;
				default: //center
					edgeOffset.y = -(dim.totalHeight/2);
					break;
			}

			pos.x += edgeOffset.x;
			pos.y += edgeOffset.y;
		}

		pos = {
			left: ((pos.x >= 0 || parentPositioned || options.allowNegative) ? pos.x : 0).toInt(),
			top: ((pos.y >= 0 || parentPositioned || options.allowNegative) ? pos.y : 0).toInt()
		};

		var xy = {left: 'x', top: 'y'};

		['minimum', 'maximum'].each(function(minmax){
			['left', 'top'].each(function(lr){
				var val = options[minmax] ? options[minmax][xy[lr]] : null;
				if (val != null && ((minmax == 'minimum') ? pos[lr] < val : pos[lr] > val)) pos[lr] = val;
			});
		});

		if (rel.getStyle('position') == 'fixed' || options.relFixedPosition){
			var winScroll = window.getScroll();
			pos.top+= winScroll.y;
			pos.left+= winScroll.x;
		}
		if (options.ignoreScroll){
			var relScroll = rel.getScroll();
			pos.top -= relScroll.y;
			pos.left -= relScroll.x;
		}

		if (options.ignoreMargins){
			pos.left += (
				options.edge.x == 'right' ? dim['margin-right'] :
				options.edge.x == 'center' ? -dim['margin-left'] + ((dim['margin-right'] + dim['margin-left'])/2) :
					- dim['margin-left']
			);
			pos.top += (
				options.edge.y == 'bottom' ? dim['margin-bottom'] :
				options.edge.y == 'center' ? -dim['margin-top'] + ((dim['margin-bottom'] + dim['margin-top'])/2) :
					- dim['margin-top']
			);
		}

		pos.left = Math.ceil(pos.left);
		pos.top = Math.ceil(pos.top);
		if (options.returnPos) return pos;
		else this.setStyles(pos);
		return this;
	}

});

})();


/*
---

script: Fx.Slide.js

name: Fx.Slide

description: Effect to slide an element in and out of view.

license: MIT-style license

authors:
  - Valerio Proietti

requires:
  - Core/Fx
  - Core/Element.Style
  - /MooTools.More

provides: [Fx.Slide]

...
*/

Fx.Slide = new Class({

	Extends: Fx,

	options: {
		mode: 'vertical',
		wrapper: false,
		hideOverflow: true,
		resetHeight: false
	},

	initialize: function(element, options){
		this.addEvent('complete', function(){
			this.open = (this.wrapper['offset' + this.layout.capitalize()] != 0);
			if (this.open && this.options.resetHeight) this.wrapper.setStyle('height', '');
		}, true);

		this.element = this.subject = document.id(element);
		this.parent(options);
		var wrapper = this.element.retrieve('wrapper');
		var styles = this.element.getStyles('margin', 'position', 'overflow');

		if (this.options.hideOverflow) styles = Object.append(styles, {overflow: 'hidden'});
		if (this.options.wrapper) wrapper = document.id(this.options.wrapper).setStyles(styles);

		this.wrapper = wrapper || new Element('div', {
			styles: styles
		}).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){
		return [0, 1].map(function(i){
			return Fx.compute(from[i], to[i], delta);
		});
	},

	start: function(how, mode){
		if (!this.check(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 = (layout == 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){
		this.get('slide').cancel().setOptions(options);
		return this;
	},

	get: function(){
		var slide = this.retrieve('slide');
		if (!slide){
			slide = new Fx.Slide(this, {link: 'cancel'});
			this.store('slide', slide);
		}
		return 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: Class.Binds.js

name: Class.Binds

description: Automagically binds specified methods in a class to the instance of the class.

license: MIT-style license

authors:
  - Aaron Newton

requires:
  - Core/Class
  - /MooTools.More

provides: [Class.Binds]

...
*/

Class.Mutators.Binds = function(binds){
	return binds;
};

Class.Mutators.initialize = function(initialize){
	return function(){
		Array.from(this.Binds).each(function(name){
			var original = this[name];
			if (original) this[name] = original.bind(this);
		}, this);
		return initialize.apply(this, arguments);
	};
};


/*
---

script: Drag.js

name: Drag

description: The base Drag Class. Can be used to drag and resize Elements using mouse events.

license: MIT-style license

authors:
  - Valerio Proietti
  - Tom Occhinno
  - Jan Kassens

requires:
  - Core/Events
  - Core/Options
  - Core/Element.Event
  - Core/Element.Style
  - Core/Element.Dimensions
  - /MooTools.More

provides: [Drag]
...

*/

var Drag = new Class({

	Implements: [Events, Options],

	options: {/*
		onBeforeStart: function(thisElement){},
		onStart: function(thisElement, event){},
		onSnap: function(thisElement){},
		onDrag: function(thisElement, event){},
		onCancel: function(thisElement){},
		onComplete: function(thisElement, event){},*/
		snap: 6,
		unit: 'px',
		grid: false,
		style: true,
		limit: false,
		handle: false,
		invert: false,
		preventDefault: false,
		stopPropagation: false,
		modifiers: {x: 'left', y: 'top'}
	},

	initialize: function(){
		var params = Array.link(arguments, {
			'options': Type.isObject,
			'element': function(obj){
				return obj != null;
			}
		});

		this.element = document.id(params.element);
		this.document = this.element.getDocument();
		this.setOptions(params.options || {});
		var htype = typeOf(this.options.handle);
		this.handles = ((htype == 'array' || htype == 'collection') ? $$(this.options.handle) : document.id(this.options.handle)) || this.element;
		this.mouse = {'now': {}, 'pos': {}};
		this.value = {'start': {}, 'now': {}};

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


		if (Browser.ie && !Drag.ondragstartFixed){
			document.ondragstart = Function.from(false);
			Drag.ondragstartFixed = true;
		}

		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: Function.from(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){
		var options = this.options;

		if (event.rightClick) return;

		if (options.preventDefault) event.preventDefault();
		if (options.stopPropagation) event.stopPropagation();
		this.mouse.start = event.page;

		this.fireEvent('beforeStart', this.element);

		var limit = options.limit;
		this.limit = {x: [], y: []};

		var styles = this.element.getStyles('left', 'right', 'top', 'bottom');
		this._invert = {
			x: options.modifiers.x == 'left' && styles.left == 'auto' && !isNaN(styles.right.toInt()) && (options.modifiers.x = 'right'),
			y: options.modifiers.y == 'top' && styles.top == 'auto' && !isNaN(styles.bottom.toInt()) && (options.modifiers.y = 'bottom')
		};

		var z, coordinates;
		for (z in options.modifiers){
			if (!options.modifiers[z]) continue;

			var style = this.element.getStyle(options.modifiers[z]);

			// Some browsers (IE and Opera) don't always return pixels.
			if (style && !style.match(/px$/)){
				if (!coordinates) coordinates = this.element.getCoordinates(this.element.getOffsetParent());
				style = coordinates[options.modifiers[z]];
			}

			if (options.style) this.value.now[z] = (style || 0).toInt();
			else this.value.now[z] = this.element[options.modifiers[z]];

			if (options.invert) this.value.now[z] *= -1;
			if (this._invert[z]) this.value.now[z] *= -1;

			this.mouse.pos[z] = event.page[z] - this.value.now[z];

			if (limit && limit[z]){
				var i = 2;
				while (i--){
					var limitZI = limit[z][i];
					if (limitZI || limitZI === 0) this.limit[z][i] = (typeof limitZI == 'function') ? limitZI() : limitZI;
				}
			}
		}

		if (typeOf(this.options.grid) == 'number') this.options.grid = {
			x: this.options.grid,
			y: this.options.grid
		};

		var events = {
			mousemove: this.bound.check,
			mouseup: this.bound.cancel
		};
		events[this.selection] = this.bound.eventStop;
		this.document.addEvents(events);
	},

	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, event]).fireEvent('snap', this.element);
		}
	},

	drag: function(event){
		var options = this.options;

		if (options.preventDefault) event.preventDefault();
		this.mouse.now = event.page;

		for (var z in options.modifiers){
			if (!options.modifiers[z]) continue;
			this.value.now[z] = this.mouse.now[z] - this.mouse.pos[z];

			if (options.invert) this.value.now[z] *= -1;
			if (this._invert[z]) this.value.now[z] *= -1;

			if (options.limit && this.limit[z]){
				if ((this.limit[z][1] || this.limit[z][1] === 0) && (this.value.now[z] > this.limit[z][1])){
					this.value.now[z] = this.limit[z][1];
				} else if ((this.limit[z][0] || this.limit[z][0] === 0) && (this.value.now[z] < this.limit[z][0])){
					this.value.now[z] = this.limit[z][0];
				}
			}

			if (options.grid[z]) this.value.now[z] -= ((this.value.now[z] - (this.limit[z][0]||0)) % options.grid[z]);

			if (options.style) this.element.setStyle(options.modifiers[z], this.value.now[z] + options.unit);
			else this.element[options.modifiers[z]] = this.value.now[z];
		}

		this.fireEvent('drag', [this.element, event]);
	},

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

	stop: function(event){
		var events = {
			mousemove: this.bound.drag,
			mouseup: this.bound.stop
		};
		events[this.selection] = this.bound.eventStop;
		this.document.removeEvents(events);
		if (event) this.fireEvent('complete', [this.element, event]);
	}

});

Element.implement({

	makeResizable: function(options){
		var drag = new Drag(this, Object.merge({
			modifiers: {
				x: 'width',
				y: 'height'
			}
		}, options));

		this.store('resizer', drag);
		return drag.addEvent('drag', function(){
			this.fireEvent('resize', drag);
		}.bind(this));
	}

});


/*
---

script: Slider.js

name: Slider

description: Class for creating horizontal and vertical slider controls.

license: MIT-style license

authors:
  - Valerio Proietti

requires:
  - Core/Element.Dimensions
  - /Class.Binds
  - /Drag
  - /Element.Measure

provides: [Slider]

...
*/

var Slider = new Class({

	Implements: [Events, Options],

	Binds: ['clickedElement', 'draggedKnob', 'scrolledElement'],

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

	initialize: function(element, knob, options){
		this.setOptions(options);
		this.element = document.id(element);
		this.knob = document.id(knob);
		this.previousChange = this.previousEnd = this.step = -1;
		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.full = this.element.measure(function(){
			this.half = this.knob[offset] / 2;
			return this.element[offset] - this.knob[offset] + (this.options.offset * 2);
		}.bind(this));

		this.setRange(this.options.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];

		var dragOptions = {
			snap: 0,
			limit: limit,
			modifiers: modifiers,
			onDrag: this.draggedKnob,
			onStart: this.draggedKnob,
			onBeforeStart: (function(){
				this.isDragging = true;
			}).bind(this),
			onCancel: function(){
				this.isDragging = false;
			}.bind(this),
			onComplete: function(){
				this.isDragging = false;
				this.draggedKnob();
				this.end();
			}.bind(this)
		};
		if (this.options.snap){
			dragOptions.grid = Math.ceil(this.stepWidth);
			dragOptions.limit[this.axis][1] = this.full;
		}

		this.drag = new Drag(this.knob, dragOptions);
		this.attach();
		if (this.options.initialStep != null) this.set(this.options.initialStep)
	},

	attach: function(){
		this.element.addEvent('mousedown', this.clickedElement);
		if (this.options.wheel) this.element.addEvent('mousewheel', this.scrolledElement);
		this.drag.attach();
		return this;
	},

	detach: function(){
		this.element.removeEvent('mousedown', this.clickedElement);
		this.element.removeEvent('mousewheel', this.scrolledElement);
		this.drag.detach();
		return this;
	},

	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.fireEvent('tick', this.toPosition(this.step));
		this.end();
		return this;
	},

	setRange: function(range, pos){
		this.min = Array.pick([range[0], 0]);
		this.max = Array.pick([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.set(Array.pick([pos, this.step]).floor(this.min).max(this.max));
		return this;
	},

	clickedElement: function(event){
		if (this.isDragging || event.target == this.knob) return;

		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.fireEvent('tick', position);
		this.end();
	},

	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: Drag.Move.js

name: Drag.Move

description: A Drag extension that provides support for the constraining of draggables to containers and droppables.

license: MIT-style license

authors:
  - Valerio Proietti
  - Tom Occhinno
  - Jan Kassens
  - Aaron Newton
  - Scott Kyle

requires:
  - Core/Element.Dimensions
  - /Drag

provides: [Drag.Move]

...
*/

Drag.Move = new Class({

	Extends: Drag,

	options: {/*
		onEnter: function(thisElement, overed){},
		onLeave: function(thisElement, overed){},
		onDrop: function(thisElement, overed, event){},*/
		droppables: [],
		container: false,
		precalculate: false,
		includeMargins: true,
		checkDroppables: true
	},

	initialize: function(element, options){
		this.parent(element, options);
		element = this.element;

		this.droppables = $$(this.options.droppables);
		this.container = document.id(this.options.container);

		if (this.container && typeOf(this.container) != 'element')
			this.container = document.id(this.container.getDocument().body);

		if (this.options.style){
			if (this.options.modifiers.x == "left" && this.options.modifiers.y == "top"){
				var parentStyles,
					parent = element.getOffsetParent();
				var styles = element.getStyles('left', 'top');
				if (parent && (styles.left == 'auto' || styles.top == 'auto')){
					element.setPosition(element.getPosition(parent));
				}
			}

			if (element.getStyle('position') == 'static') element.setStyle('position', 'absolute');
		}

		this.addEvent('start', this.checkDroppables, true);
		this.overed = null;
	},

	start: function(event){
		if (this.container) this.options.limit = this.calculateLimit();

		if (this.options.precalculate){
			this.positions = this.droppables.map(function(el){
				return el.getCoordinates();
			});
		}

		this.parent(event);
	},

	calculateLimit: function(){
		var element = this.element,
			container = this.container,

			offsetParent = document.id(element.getOffsetParent()) || document.body,
			containerCoordinates = container.getCoordinates(offsetParent),
			elementMargin = {},
			elementBorder = {},
			containerMargin = {},
			containerBorder = {},
			offsetParentPadding = {};

		['top', 'right', 'bottom', 'left'].each(function(pad){
			elementMargin[pad] = element.getStyle('margin-' + pad).toInt();
			elementBorder[pad] = element.getStyle('border-' + pad).toInt();
			containerMargin[pad] = container.getStyle('margin-' + pad).toInt();
			containerBorder[pad] = container.getStyle('border-' + pad).toInt();
			offsetParentPadding[pad] = offsetParent.getStyle('padding-' + pad).toInt();
		}, this);

		var width = element.offsetWidth + elementMargin.left + elementMargin.right,
			height = element.offsetHeight + elementMargin.top + elementMargin.bottom,
			left = 0,
			top = 0,
			right = containerCoordinates.right - containerBorder.right - width,
			bottom = containerCoordinates.bottom - containerBorder.bottom - height;

		if (this.options.includeMargins){
			left += elementMargin.left;
			top += elementMargin.top;
		} else {
			right += elementMargin.right;
			bottom += elementMargin.bottom;
		}

		if (element.getStyle('position') == 'relative'){
			var coords = element.getCoordinates(offsetParent);
			coords.left -= element.getStyle('left').toInt();
			coords.top -= element.getStyle('top').toInt();

			left -= coords.left;
			top -= coords.top;
			if (container.getStyle('position') != 'relative'){
				left += containerBorder.left;
				top += containerBorder.top;
			}
			right += elementMargin.left - coords.left;
			bottom += elementMargin.top - coords.top;

			if (container != offsetParent){
				left += containerMargin.left + offsetParentPadding.left;
				top += ((Browser.ie6 || Browser.ie7) ? 0 : containerMargin.top) + offsetParentPadding.top;
			}
		} else {
			left -= elementMargin.left;
			top -= elementMargin.top;
			if (container != offsetParent){
				left += containerCoordinates.left + containerBorder.left;
				top += containerCoordinates.top + containerBorder.top;
			}
		}

		return {
			x: [left, right],
			y: [top, bottom]
		};
	},

	checkDroppables: function(){
		var overed = this.droppables.filter(function(el, i){
			el = this.positions ? this.positions[i] : el.getCoordinates();
			var now = this.mouse.now;
			return (now.x > el.left && now.x < el.right && now.y < el.bottom && now.y > el.top);
		}, this).getLast();

		if (this.overed != overed){
			if (this.overed) this.fireEvent('leave', [this.element, this.overed]);
			if (overed) this.fireEvent('enter', [this.element, overed]);
			this.overed = overed;
		}
	},

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

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

});

Element.implement({

	makeDraggable: function(options){
		var drag = new Drag.Move(this, options);
		this.store('dragger', drag);
		return drag;
	}

});


/*
---

script: Sortables.js

name: Sortables

description: Class for creating a drag and drop sorting interface for lists of items.

license: MIT-style license

authors:
  - Tom Occhino

requires:
  - /Drag.Move

provides: [Sortables]

...
*/

var Sortables = new Class({

	Implements: [Events, Options],

	options: {/*
		onSort: function(element, clone){},
		onStart: function(element, clone){},
		onComplete: function(element){},*/
		snap: 4,
		opacity: 1,
		clone: false,
		revert: false,
		handle: false,
		constrain: false,
		preventDefault: false
	},

	initialize: function(lists, options){
		this.setOptions(options);

		this.elements = [];
		this.lists = [];
		this.idle = true;

		this.addLists($$(document.id(lists) || lists));

		if (!this.options.clone) this.options.revert = false;
		if (this.options.revert) this.effect = new Fx.Morph(null, Object.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', function(event){
				this.start.call(this, event, element);
			}.bind(this));
			(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(){
		return $$(Array.flatten(arguments).map(function(element){
			this.elements.erase(element);
			var start = element.retrieve('sortables:start');
			(this.options.handle ? element.getElement(this.options.handle) || element : element).removeEvent('mousedown', start);

			return element;
		}, this));
	},

	removeLists: function(){
		return $$(Array.flatten(arguments).map(function(list){
			this.lists.erase(list);
			this.removeItems(list.getChildren());

			return list;
		}, this));
	},

	getClone: function(event, element){
		if (!this.options.clone) return new Element(element.tagName).inject(document.body);
		if (typeOf(this.options.clone) == 'function') return this.options.clone.call(this, event, element, this.list);
		var clone = element.clone(true).setStyles({
			margin: 0,
			position: 'absolute',
			visibility: 'hidden',
			width: element.getStyle('width')
		});
		//prevent the duplicated radio inputs from unchecking the real one
		if (clone.get('html').test('radio')){
			clone.getElements('input[type=radio]').each(function(input, i){
				input.set('name', 'clone_' + i);
				if (input.get('checked')) element.getElements('input[type=radio]')[i].set('checked', true);
			});
		}

		return clone.inject(this.list).setPosition(element.getPosition(element.getOffsetParent()));
	},

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

	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 ||
			event.rightClick ||
			['button', 'input'].contains(event.target.get('tag'))
		) 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, {
			preventDefault: this.options.preventDefault,
			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.getOffsetParent()));
			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: Type.isFunction,
			index: function(obj){
				return obj != null;
			}
		});
		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 (index || index === 0) && index >= 0 && index < this.lists.length ? serial[index] : serial;
	}

});