// JavaScript Document
function addRollover(img,roller){
    if(typeof img == "string"){
        var id = img;
        img = null;
       
        if(document.getElementById){
            img = document.getElementById("id");
        } else if(document.all){
            img = document.all["id"];
        }
       
        if(!img)img = document.images[id];
        if(!img)return
    }
   
    if(img.tagName.toLowerCase()!="img")return;
   
    var base = img.src;
    (new Image()).src = roller;

    img.onmouseover = function(){img.src = roller;}
    img.onmouseout  = function(){img.src = base;}
}

function initRollover(){
    var images = document.getElementsByTagName("img");
    for(var i=0;i<images.length;i++){
        var image = images[i];
        var roller = image.getAttribute("roller");
        if(roller){
            addRollover(image,roller);
        }
    }
}