if(!Control)var Control={};Control.Slider=Class.create();Control.Slider.prototype={initialize:function(handle,track,options){var slider=this;if(handle instanceof Array){this.handles=handle.collect(function(e){return $(e)});}else{this.handles=[$(handle)];}
this.track=$(track);this.options=options||{};this.axis=this.options.axis||'horizontal';this.increment=this.options.increment||1;this.step=parseInt(this.options.step||'1');this.range=this.options.range||$R(0,1);this.value=0;this.values=this.handles.map(function(){return 0});this.spans=this.options.spans?this.options.spans.map(function(s){return $(s)}):false;this.options.startSpan=$(this.options.startSpan||null);this.options.endSpan=$(this.options.endSpan||null);this.restricted=this.options.restricted||false;this.maximum=this.options.maximum||this.range.end;this.minimum=this.options.minimum||this.range.start;this.alignX=parseInt(this.options.alignX||'0');this.alignY=parseInt(this.options.alignY||'0');this.trackLength=this.maximumOffset()-this.minimumOffset();this.handleLength=this.isVertical()?(this.handles[0].offsetHeight!=0?this.handles[0].offsetHeight:this.handles[0].style.height.replace(/px$/,"")):(this.handles[0].offsetWidth!=0?this.handles[0].offsetWidth:this.handles[0].style.width.replace(/px$/,""));this.active=false;this.dragging=false;this.disabled=false;if(this.options.disabled)this.setDisabled();this.allowedValues=this.options.values?this.options.values.sortBy(Prototype.K):false;if(this.allowedValues){this.minimum=this.allowedValues.min();this.maximum=this.allowedValues.max();}
this.eventMouseDown=this.startDrag.bindAsEventListener(this);this.eventMouseUp=this.endDrag.bindAsEventListener(this);this.eventMouseMove=this.update.bindAsEventListener(this);this.handles.each(function(h,i){i=slider.handles.length-1-i;slider.setValue(parseFloat((slider.options.sliderValue instanceof Array?slider.options.sliderValue[i]:slider.options.sliderValue)||slider.range.start),i);Element.makePositioned(h);Event.observe(h,"mousedown",slider.eventMouseDown);});Event.observe(this.track,"mousedown",this.eventMouseDown);Event.observe(document,"mouseup",this.eventMouseUp);Event.observe(document,"mousemove",this.eventMouseMove);this.initialized=true;},dispose:function(){var slider=this;Event.stopObserving(this.track,"mousedown",this.eventMouseDown);Event.stopObserving(document,"mouseup",this.eventMouseUp);Event.stopObserving(document,"mousemove",this.eventMouseMove);this.handles.each(function(h){Event.stopObserving(h,"mousedown",slider.eventMouseDown);});},setDisabled:function(){this.disabled=true;},setEnabled:function(){this.disabled=false;},getNearestValue:function(value){if(this.allowedValues){if(value>=this.allowedValues.max())return(this.allowedValues.max());if(value<=this.allowedValues.min())return(this.allowedValues.min());var offset=Math.abs(this.allowedValues[0]-value);var newValue=this.allowedValues[0];this.allowedValues.each(function(v){var currentOffset=Math.abs(v-value);if(currentOffset<=offset){newValue=v;offset=currentOffset;}});return newValue;}
if(value>this.range.end)return this.range.end;if(value<this.range.start)return this.range.start;return value;},setValue:function(sliderValue,handleIdx){if(!this.active){this.activeHandleIdx=handleIdx||0;this.activeHandle=this.handles[this.activeHandleIdx];this.updateStyles();}
handleIdx=handleIdx||this.activeHandleIdx||0;if(this.initialized&&this.restricted){if((handleIdx>0)&&(sliderValue<this.values[handleIdx-1]))
sliderValue=this.values[handleIdx-1];if((handleIdx<(this.handles.length-1))&&(sliderValue>this.values[handleIdx+1]))
sliderValue=this.values[handleIdx+1];}
sliderValue=this.getNearestValue(sliderValue);this.values[handleIdx]=sliderValue;this.value=this.values[0];this.handles[handleIdx].style[this.isVertical()?'top':'left']=this.translateToPx(sliderValue);this.drawSpans();if(!this.dragging||!this.event)this.updateFinished();},setValueBy:function(delta,handleIdx){this.setValue(this.values[handleIdx||this.activeHandleIdx||0]+delta,handleIdx||this.activeHandleIdx||0);},translateToPx:function(value){return Math.round(((this.trackLength-this.handleLength)/(this.range.end-this.range.start))*(value-this.range.start))+"px";},translateToValue:function(offset){return((offset/(this.trackLength-this.handleLength)*(this.range.end-this.range.start))+this.range.start);},getRange:function(range){var v=this.values.sortBy(Prototype.K);range=range||0;return $R(v[range],v[range+1]);},minimumOffset:function(){return(this.isVertical()?this.alignY:this.alignX);},maximumOffset:function(){return(this.isVertical()?(this.track.offsetHeight!=0?this.track.offsetHeight:this.track.style.height.replace(/px$/,""))-this.alignY:(this.track.offsetWidth!=0?this.track.offsetWidth:this.track.style.width.replace(/px$/,""))-this.alignY);},isVertical:function(){return(this.axis=='vertical');},drawSpans:function(){var slider=this;if(this.spans)
$R(0,this.spans.length-1).each(function(r){slider.setSpan(slider.spans[r],slider.getRange(r))});if(this.options.startSpan)
this.setSpan(this.options.startSpan,$R(0,this.values.length>1?this.getRange(0).min():this.value));if(this.options.endSpan)
this.setSpan(this.options.endSpan,$R(this.values.length>1?this.getRange(this.spans.length-1).max():this.value,this.maximum));},setSpan:function(span,range){if(this.isVertical()){span.style.top=this.translateToPx(range.start);span.style.height=this.translateToPx(range.end-range.start+this.range.start);}else{span.style.left=this.translateToPx(range.start);span.style.width=this.translateToPx(range.end-range.start+this.range.start);}},updateStyles:function(){this.handles.each(function(h){Element.removeClassName(h,'selected')});Element.addClassName(this.activeHandle,'selected');},startDrag:function(event){if(Event.isLeftClick(event)){if(!this.disabled){this.active=true;var handle=Event.element(event);var pointer=[Event.pointerX(event),Event.pointerY(event)];var track=handle;if(track==this.track){var offsets=Position.cumulativeOffset(this.track);this.event=event;this.setValue(this.translateToValue((this.isVertical()?pointer[1]-offsets[1]:pointer[0]-offsets[0])-(this.handleLength/2)));var offsets=Position.cumulativeOffset(this.activeHandle);this.offsetX=(pointer[0]-offsets[0]);this.offsetY=(pointer[1]-offsets[1]);}else{while((this.handles.indexOf(handle)==-1)&&handle.parentNode)
handle=handle.parentNode;if(this.handles.indexOf(handle)!=-1){this.activeHandle=handle;this.activeHandleIdx=this.handles.indexOf(this.activeHandle);this.updateStyles();var offsets=Position.cumulativeOffset(this.activeHandle);this.offsetX=(pointer[0]-offsets[0]);this.offsetY=(pointer[1]-offsets[1]);}}}
Event.stop(event);}},update:function(event){if(this.active){if(!this.dragging)this.dragging=true;this.draw(event);if(navigator.appVersion.indexOf('AppleWebKit')>0)window.scrollBy(0,0);Event.stop(event);}},draw:function(event){var pointer=[Event.pointerX(event),Event.pointerY(event)];var offsets=Position.cumulativeOffset(this.track);pointer[0]-=this.offsetX+offsets[0];pointer[1]-=this.offsetY+offsets[1];this.event=event;this.setValue(this.translateToValue(this.isVertical()?pointer[1]:pointer[0]));if(this.initialized&&this.options.onSlide)
this.options.onSlide(this.values.length>1?this.values:this.value,this);},endDrag:function(event){if(this.active&&this.dragging){this.finishDrag(event,true);Event.stop(event);}
this.active=false;this.dragging=false;},finishDrag:function(event,success){this.active=false;this.dragging=false;this.updateFinished();},updateFinished:function(){if(this.initialized&&this.options.onChange)
this.options.onChange(this.values.length>1?this.values:this.value,this);this.event=null;}}