if(!Control)var Control={};Control.Slider=Class.create({initialize:function(handle,track,options){var slider=this;if(Object.isArray(handle))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;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((Object.isArray(slider.options.sliderValue)?slider.options.sliderValue[i]:slider.options.sliderValue)||slider.range.start),i);h.makePositioned().observe("mousedown",slider.eventMouseDown)});this.track.observe("mousedown",this.eventMouseDown);document.observe("mouseup",this.eventMouseUp);document.observe("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),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();(!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$/,""))-this.alignX},isVertical:function(){return this.axis=="vertical"},drawSpans:function(){var slider=this;this.spans&&$R(0,this.spans.length-1).each(function(r){slider.setSpan(slider.spans[r],slider.getRange(r))});this.options.startSpan&&this.setSpan(this.options.startSpan,$R(0,this.values.length>1?this.getRange(0).min():this.value));this.options.endSpan&&this.setSpan(this.options.endSpan,$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),pointer=[Event.pointerX(event),Event.pointerY(event)],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);Prototype.Browser.WebKit&&window.scrollBy(0,0);Event.stop(event)}},draw:function(event){var pointer=[Event.pointerX(event),Event.pointerY(event)],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]));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(){this.active=false;this.dragging=false;this.updateFinished()},updateFinished:function(){this.initialized&&this.options.onChange&&this.options.onChange(this.values.length>1?this.values:this.value,this);this.event=null}});