text: // script.aculo.us slider.js v1.8.2, Tue Nov 18 18:30:58 +0100 2008
  
  // Copyright (c) 2005-2008 Marty Haught, Thomas Fuchs
  //
  // script.aculo.us is freely distributable under the terms of an MIT-style license.
  // For details, see the script.aculo.us web site: http://script.aculo.us/
  
  if(!Control){var Control={}}Control.Slider=Class.create({initialize:function(d,a,b){var c=this;if(Object.isArray(d)){this.handles=d.collect(function(f){return $(f)})}else{this.handles=[$(d)]}this.track=$(a);this.options=b||{};this.axis=this.options.axis||"horizontal";this.increment=this.options.increment||1;this.step=parseInt(this.options.step||"1");this.range=this.options.range||$R(0,1);this.value=0;this.values=this.handles.map(function(){return 0});this.spans=this.options.spans?this.options.spans.map(function(e){return $(e)}):false;this.options.startSpan=$(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(f,e){e=c.handles.length-1-e;c.setValue(parseFloat((Object.isArray(c.options.sliderValue)?c.options.sliderValue[e]:c.options.sliderValue)||c.range.start),e);f.makePositioned().observe("mousedown",c.eventMouseDown)});this.track.observe("mousedown",this.eventMouseDown);document.observe("mouseup",this.eventMouseUp);document.observe("mousemove",this.eventMouseMove);this.initialized=true},dispose:function(){var a=this;Event.stopObserving(this.track,"mousedown",this.eventMouseDown);Event.stopObserving(document,"mouseup",this.eventMouseUp);Event.stopObserving(document,"mousemove",this.eventMouseMove);this.handles.each(function(b){Event.stopObserving(b,"mousedown",a.eventMouseDown)})},setDisabled:function(){this.disabled=true},setEnabled:function(){this.disabled=false},getNearestValue:function(a){if(this.allowedValues){if(a>=this.allowedValues.max()){return(this.allowedValues.max())}if(a<=this.allowedValues.min()){return(this.allowedValues.min())}var c=Math.abs(this.allowedValues[0]-a);var b=this.allowedValues[0];this.allowedValues.each(function(d){var e=Math.abs(d-a);if(e<=c){b=d;c=e}});return b}if(a>this.range.end){return this.range.end}if(a<this.range.start){return this.range.start}return a},setValue:function(b,a){if(!this.active){this.activeHandleIdx=a||0;this.activeHandle=this.handles[this.activeHandleIdx];this.updateStyles()}a=a||this.activeHandleIdx||0;if(this.initialized&&this.restricted){if((a>0)&&(b<this.values[a-1])){b=this.values[a-1]}if((a<(this.handles.length-1))&&(b>this.values[a+1])){b=this.values[a+1]}}b=this.getNearestValue(b);this.values[a]=b;this.value=this.values[0];this.handles[a].style[this.isVertical()?"top":"left"]=this.translateToPx(b);this.drawSpans();if(!this.dragging||!this.event){this.updateFinished()}},setValueBy:function(b,a){this.setValue(this.values[a||this.activeHandleIdx||0]+b,a||this.activeHandleIdx||0)},translateToPx:function(a){return Math.round(((this.trackLength-this.handleLength)/(this.range.end-this.range.start))*(a-this.range.start))+"px"},translateToValue:function(a){return((a/(this.trackLength-this.handleLength)*(this.range.end-this.range.start))+this.range.start)},getRange:function(b){var a=this.values.sortBy(Prototype.K);b=b||0;return $R(a[b],a[b+1])},minimumOffset:function(){return(this.isVertical()?this.alignY:this.alignX)},maximumOffset:function(){return(this.isVertical()?(this.track.offsetHeight!=0?this.track.offsetHeight:this.track.style.height.replace(/px$/,""))-this.alignY:(this.track.offsetWidth!=0?this.track.offsetWidth:this.track.style.width.replace(/px$/,""))-this.alignX)},isVertical:function(){return(this.axis=="vertical")},drawSpans:function(){var a=this;if(this.spans){$R(0,this.spans.length-1).each(function(b){a.setSpan(a.spans[b],a.getRange(b))})}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(b,a){if(this.isVertical()){b.style.top=this.translateToPx(a.start);b.style.height=this.translateToPx(a.end-a.start+this.range.start)}else{b.style.left=this.translateToPx(a.start);b.style.width=this.translateToPx(a.end-a.start+this.range.start)}},updateStyles:function(){this.handles.each(function(a){Element.removeClassName(a,"selected")});Element.addClassName(this.activeHandle,"selected")},startDrag:function(c){if(Event.isLeftClick(c)){if(!this.disabled){this.active=true;var d=Event.element(c);var e=[Event.pointerX(c),Event.pointerY(c)];var a=d;if(a==this.track){var b=Position.cumulativeOffset(this.track);this.event=c;this.setValue(this.translateToValue((this.isVertical()?e[1]-b[1]:e[0]-b[0])-(this.handleLength/2)));var b=Position.cumulativeOffset(this.activeHandle);this.offsetX=(e[0]-b[0]);this.offsetY=(e[1]-b[1])}else{while((this.handles.indexOf(d)==-1)&&d.parentNode){d=d.parentNode}if(this.handles.indexOf(d)!=-1){this.activeHandle=d;this.activeHandleIdx=this.handles.indexOf(this.activeHandle);this.updateStyles();var b=Position.cumulativeOffset(this.activeHandle);this.offsetX=(e[0]-b[0]);this.offsetY=(e[1]-b[1])}}}Event.stop(c)}},update:function(a){if(this.active){if(!this.dragging){this.dragging=true}this.draw(a);if(Prototype.Browser.WebKit){window.scrollBy(0,0)}Event.stop(a)}},draw:function(b){var c=[Event.pointerX(b),Event.pointerY(b)];var a=Position.cumulativeOffset(this.track);c[0]-=this.offsetX+a[0];c[1]-=this.offsetY+a[1];this.event=b;this.setValue(this.translateToValue(this.isVertical()?c[1]:c[0]));if(this.initialized&&this.options.onSlide){this.options.onSlide(this.values.length>1?this.values:this.value,this)}},endDrag:function(a){if(this.active&&this.dragging){this.finishDrag(a,true);Event.stop(a)}this.active=false;this.dragging=false},finishDrag:function(a,b){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}});