var rep = "/menu/";
var pref = "over_";

function initRollover(){
src1=src2=el=0;imageOver=[];D=document;
im=D.getElementsByTagName('img');if(!im)return;
for(var i=0; i < im.length; ++i){
  if(im[i].src.indexOf(rep)!=-1 && im[i].src.indexOf(rep+pref)==-1){
  
    imageOver[i]=new Image();
    imageOver[i].src=im[i].src.replace(rep,rep+pref)
    }
 }
 addEvent(D,"mouseover",over_img);
 addEvent(D,"mouseout",down_img);
}

function over_img(e){
el=window.Event?e.target:event.srcElement;
if(el.tagName=="IMG" && el.src.indexOf(rep)!=-1 && el.src.indexOf(rep+pref)==-1){
  src1=el.src;el.src=el.src.replace(rep,rep+pref)
  }
}

function down_img(){if(src1)el.src=src1;src1=0}

function addEvent(obj,evType,fn,capt){
if(obj.addEventListener){obj.addEventListener(evType,fn,capt);return true;}
else if(obj.attachEvent)obj.attachEvent("on"+evType,fn)
else {return false;}
}


addEvent(window,"load",initRollover)