ÿþfunction addRollover(img, rolloverURL) {

    if (typeof img == "string") {  // If img is a string,

        var id = img;            // it is an id, not an image

        img = null;              // and we don't have an image yet.



        //First try looking the image up by an id

        if (document.getElementById) img = document.getElementById(id);

        else if (document.all) img = document.all[id]



        //if not found by id, try looking the image up by name

        if (!img) img = document.images[id];



        //if we couldn't find the image, do nothing and fail silently

        if (!img) return;



    }



    // if we found an element but it is not an <img> tag, we also fail

    if (img.tagName.toLowerCase() != "img") return;



    //Remember the original URL of the image

    var baseURL = img.src;



    //Preload the rollover image into the browser's cache

    var rollOverobj = new Image(); 

    rollOverobj.src = rolloverURL;



    img.onmouseover = function() { img.src = rollOverobj.src; }

    img.onmouseout = function() { img.src = baseURL; }

}



function initRollovers() {

    var images = document.getElementsByTagName("img");

    for (var i = 0; i < images.length; i++) {

        var image = images[i];

        var rolloverURL = image.getAttribute("rollover");

        if (rolloverURL) addRollover(image, rolloverURL);

    }

}