var clear="src/clear.gif"
function fixPNG(elt){if(Browser.Engine.trident4){elt.each(function(elmt){elmt.getChildren('img').each(function(el){if((el.src).test('.png','i')){el.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+el.src+"',sizingMethod='crop')";el.src=clear;}});});}}
function stripFiletype(ref){var x=ref.replace('.html');return x.replace('#','');}
function initOrigin(l){if(l.xorigin=='left'){l.xorigin=0;}else if(l.xorigin=='middle'||l.xorigin=='centre'||l.xorigin=='center'){l.xorigin=0.5;}else if(l.xorigin=='right'){l.xorigin=1;}
if(l.yorigin=='top'){l.yorigin=0;}else if(l.yorigin=='middle'||l.yorigin=='centre'||l.yorigin=='center'){l.yorigin=0.5;}else if(l.yorigin=='bottom'){l.yorigin=1;}}
function positionMouse(mouseport,localmouse,virtualmouse){var difference={x:0,y:0,sum:0};if(!mouseport.ontarget){difference.x=virtualmouse.x-localmouse.x;difference.y=virtualmouse.y-localmouse.y;difference.sum=Math.sqrt(difference.x*difference.x+difference.y*difference.y);virtualmouse.x=localmouse.x+difference.x*mouseport.takeoverFactor;virtualmouse.y=localmouse.y+difference.y*mouseport.takeoverFactor;if(difference.sum<mouseport.takeoverThresh&&difference.sum>mouseport.takeoverThresh*-1){mouseport.ontarget=true;}}
else{virtualmouse.x=localmouse.x;virtualmouse.y=localmouse.y;}}
function setupPorts(viewport,mouseport){var offset=mouseport.element.getCoordinates();$extend(viewport,{width:viewport.element.getSize().x,height:viewport.element.getSize().y});$extend(mouseport,{width:mouseport.element.getSize().x,height:mouseport.element.getSize().y,top:offset.top,left:offset.left});}
function parseTravel(travel,origin,dimension){var offset;var cssPos;if(typeof(travel)==='string'){if(travel.search(/^\d+\s?px$/)!=-1){travel=travel.replace('px','');travel=parseInt(travel,10);offset=origin*(dimension-travel);cssPos=origin*100+'%';return{travel:travel,travelpx:true,offset:offset,cssPos:cssPos};}
else if(travel.search(/^\d+\s?%$/)!=-1){travel.replace('%','');travel=parseInt(travel,10)/100;}
else{travel=1;}}
offset=origin*(1-travel);return{travel:travel,travelpx:false,offset:offset}}
function setupLayer(layer,i,mouseport){var xStuff;var yStuff;var cssObject={};layer[i]=$extend({width:$(layer[i].element).getSize().x,height:$(layer[i].element).getSize().y},layer[i]);xStuff=parseTravel(layer[i].xtravel,layer[i].xorigin,layer[i].width);yStuff=parseTravel(layer[i].ytravel,layer[i].yorigin,layer[i].height);$extend(layer[i],{diffxrat:mouseport.width/(layer[i].width-mouseport.width),diffyrat:mouseport.height/(layer[i].height-mouseport.height),xtravel:xStuff.travel,ytravel:yStuff.travel,xtravelpx:xStuff.travelpx,ytravelpx:yStuff.travelpx,xoffset:xStuff.offset,yoffset:yStuff.offset});if(xStuff.travelpx){cssObject.left=xStuff.cssPos;}
if(yStuff.travelpx){cssObject.top=yStuff.cssPos;}
if(xStuff.travelpx||yStuff.travelpx){layer[i].element.setStyles(cssObject);}}
function setupLayerContents(layer,i,viewportOffset){var contentOffset;$extend(layer[i],{content:[]});for(var n=0;n<layer[i].element.getChildren().length;n++){if(!layer[i].content[n])layer[i].content[n]={};if(!layer[i].content[n].element)layer[i].content[n]['element']=layer[i].element.getChildren()[n];if(!layer[i].content[n].anchor&&layer[i].content[n].element.getChildren('a').getProperty('name')){layer[i].content[n]['anchor']=layer[i].content[n].element.getChildren('a').getProperty('name');}
if(layer[i].content[n].anchor){contentOffset=layer[i].content[n].element.getCoordinates();$extend(layer[i].content[n],{width:layer[i].content[n].element.getSize().x,height:layer[i].content[n].element.getSize().y,x:contentOffset.left-viewportOffset.left,y:contentOffset.top-viewportOffset.top});$extend(layer[i].content[n],{posxrat:(layer[i].content[n].x+layer[i].content[n].width/2)/layer[i].width,posyrat:(layer[i].content[n].y+layer[i].content[n].height/2)/layer[i].height});}}}
function moveLayers(layer,xratio,yratio){var xpos;var ypos;var cssObject;for(var i=0;i<layer.length;i++){xpos=layer[i].xtravel*xratio+layer[i].xoffset;ypos=layer[i].ytravel*yratio+layer[i].yoffset;cssObject={};if(layer[i].xparallax){if(layer[i].xtravelpx){cssObject.marginLeft=xpos*-1+'px';}
else{cssObject.left=xpos*100+'%';cssObject.marginLeft=xpos*layer[i].width*-1+'px';}}
if(layer[i].yparallax){if(layer[i].ytravelpx){cssObject.marginTop=ypos*-1+'px';}
else{cssObject.top=ypos*100+'%';cssObject.marginTop=ypos*layer[i].height*-1+'px';}}
layer[i].element.setStyles(cssObject);}}
var mParallax=new Class({Implements:[Options],options:{mouseResponse:true,mouseActiveOutside:false,triggers:new Array(),triggerResponse:true,triggerExposesEdges:false,xparallax:true,yparallax:true,xorigin:0.5,yorigin:0.5,xtravel:1,ytravel:1,takeoverFactor:0.65,takeoverThresh:0.002,frameDuration:25},initialize:function(element,options){this.setOptions(options);var settingsLayer={xparallax:this.options.xparallax,yparallax:this.options.yparallax,xorigin:this.options.xorigin,yorigin:this.options.yorigin,xtravel:this.options.xtravel,ytravel:this.options.ytravel};var settingsMouseport={takeoverFactor:this.options.takeoverFactor,takeoverThresh:this.options.takeoverThresh};var layersettings=[];for(var a=2;a<arguments.length;a++){layersettings.push($merge(settingsLayer,arguments[a]));}
if($type(element)=='array'){var elt=element;}else{var elt=[element];}
$each(elt,function(elmt){var localmouse={x:0.5,y:0.5};var virtualmouse={x:0.5,y:0.5};var timer={running:false,frame:this.options.frameDuration,fire:function(x,y){positionMouse(mouseport,localmouse,virtualmouse);moveLayers(layer,virtualmouse.x,virtualmouse.y);this.running=setTimeout(function(){if(localmouse.x!=x||localmouse.y!=y||!mouseport.ontarget){timer.fire(localmouse.x,localmouse.y);}
else if(timer.running){timer.running=false;}},timer.frame);}};var viewport={element:$(elmt)};var mouseport={element:$(viewport.element)};$extend(mouseport,settingsMouseport);$extend(mouseport,{xinside:false,yinside:false,active:false,ontarget:false});var layer=[];function matrixSearch(layer,ref,callback){for(var i=0;i<layer.length;i++){var gotcha=false;for(var n=0;n<layer[i].content.length;n++){if(layer[i].content[n].anchor==ref){callback(i,n);return[i,n];}}}
return false;}
setupPorts(viewport,mouseport);for(var i=0;i<viewport.element.getChildren().length;i++){layer[i]={element:$(viewport.element.getChildren()[i])};$extend(layer[i],settingsLayer);$extend(layer[i],layersettings[i]);setupLayer(layer,i,mouseport);if(this.options.triggerResponse){setupLayerContents(layer,i,viewport.element.getCoordinates());}}
viewport.element.getChildren().setStyle('position','absolute');moveLayers(layer,0.5,0.5);if(this.options.mouseResponse){document.addEvent('mousemove',function(mouse){mouseport.xinside=(mouse.page.x>=mouseport.left&&mouse.page.x<mouseport.width+mouseport.left)?true:false;mouseport.yinside=(mouse.page.y>=mouseport.top&&mouse.page.y<mouseport.height+mouseport.top)?true:false;if(mouseport.xinside&&mouseport.yinside&&!mouseport.active){mouseport.ontarget=false;mouseport.active=true;}
if(mouseport.active){if(mouseport.xinside){localmouse.x=(mouse.page.x-mouseport.left)/mouseport.width;}
else{localmouse.x=(mouse.page.x<mouseport.left)?0:1;}
if(mouseport.yinside){localmouse.y=(mouse.page.y-mouseport.top)/mouseport.height;}
else{localmouse.y=(mouse.page.y<mouseport.top)?0:1;}}
if(mouseport.xinside&&mouseport.yinside){if(!timer.running)timer.fire(localmouse.x,localmouse.y);}
else if(mouseport.active){mouseport.active=false;}});}
if(this.options.triggerResponse&&this.options.triggers.length!=0){this.options.triggers.each(function(link){var triggerExposesEdges=this.options.triggerExposesEdges;link.addEvent('click',function(){ref=link.getProperty('href');ref=stripFiletype(ref);matrixSearch(layer,ref,function(i,n){localmouse.x=layer[i].content[n].posxrat*(layer[i].diffxrat+1)-(0.5*layer[i].diffxrat);localmouse.y=layer[i].content[n].posyrat*(layer[i].diffyrat+1)-(0.5*layer[i].diffyrat);if(!triggerExposesEdges){if(localmouse.x<0)localmouse.x=0;if(localmouse.x>1)localmouse.x=1;if(localmouse.y<0)localmouse.y=0;if(localmouse.y>1)localmouse.y=1;}
mouseport.ontarget=false;if(!timer.running)timer.fire(localmouse.x,localmouse.y);});return false;});}.bind(this));}
window.addEvent('resize',function(){setupPorts(viewport,mouseport);for(var i=0;i<layer.length;i++){setupLayer(layer,i,mouseport);}});}.bind(this));}});