var prePaths=[],preImages=[],rollImages=[];function addEvent(evt,func,obj){obj=obj?obj:window;if(obj.addEventListener){obj.addEventListener(evt,func,false);return true;}
else if(obj.attachEvent){var ev=obj.attachEvent('on'+evt,func,event);return ev;}
else return false;}
function preload(){for(var i=0,path;path=prePaths[i];i++){var l=preImages.length;preImages[l]=new Image();preImages[l].src=path;}}
function preroll(){var pre=[],pics=document.getElementsByTagName('img'),links=document.getElementsByTagName('a');for(var i=0,pic;pic=pics[i];i++){if(pic.className.match(/[^\-]\bover\b[^\-]|^over$|^over\b[^\-]|[^\-]\bover$/i)){var wrap=pic.parentNode,path=pic.src,dot=path.lastIndexOf('.');if(path&&(dot>0))prePaths[prePaths.length]=path.substring(0,dot)+'-o'+path.substring(dot,path.length);if(wrap&&wrap.tagName=='A'){addEvent('mouseover',rollover,wrap);addEvent('mouseout',rollout,wrap);addEvent('focus',rollover,wrap);addEvent('blur',rollout,wrap);}}}
for(var i=0,a;a=links[i];i++)
if(a.onmouseover&&a.getElementsByTagName('img')[0])a.onfocus=a.onmouseover;for(var i=0,arg;arg=arguments[i];i++)prePaths[prePaths.length]=arg;addEvent('load',preload);}
function rollover(e){var ev=e?e:window.event,srcEl=ev.target?ev.target:ev.srcElement;if(srcEl.nodeType==3)srcEl=srcEl.parentNode;srcEl=srcEl.tagName=='IMG'?srcEl:srcEl.getElementsByTagName('img')[0];var path=srcEl.src,dot=path.lastIndexOf('.');srcEl.src=(srcEl.className.indexOf('activeimg')>-1)?path.replace('-a.','-o.'):(!path.match(/\-o\./gi))?path.substring(0,dot)+'-o'+path.substring(dot,path.length):path;}
function rollout(e){var ev=e?e:window.event,srcEl=ev.target?ev.target:ev.srcElement;if(srcEl.nodeType==3)srcEl=srcEl.parentNode;srcEl=srcEl.tagName=='IMG'?srcEl:srcEl.getElementsByTagName('img')[0];var path=srcEl.src;srcEl.src=(srcEl.className.indexOf('activeimg')>-1)?path.replace('-o.','-a.'):path.replace('-o.','.');}
function roll(e){var a=arguments;if(a.length<2)for(var i=0,img;img=rollImages[i];i++)img.src=img.old;else{for(var i=0,pic;pic=document.getElementById(a[i]);i=i+2){var flag=0,path=a[i+1],ev=window.event?window.event:e,srcEl=ev.target?ev.target:ev.srcElement;if(!path||!ev)return;if(srcEl&&srcEl.nodeType==3)srcEl=srcEl.parentNode;for(var j=0,img;img=rollImages[j];j++)
if(pic==img){flag=1;break;}
if(!flag)rollImages[rollImages.length]=pic;if(!pic.old)pic.old=pic.src;pic.src=path;if(!i){addEvent('mouseout',roll,srcEl);addEvent('blur',roll,srcEl);}}}}