function rollover(img, state)
    {
        if(state)
            img.src = img.src.replace(/off/, "on");
        else
            img.src = img.src.replace(/on/, "off");
    }
    function initRollover()
    {
        var all = document.all ? document.all :
            document.getElementsByTagName('img');
        for (var e = 0; e < all.length; e++)
        if (all[e].className.indexOf("rollover")>-1)
        {
            all[e].onmouseover = function(){rollover(this, true)};
            all[e].onmouseout = function(){rollover(this, false)};
        }
        var all = document.all ? document.all :
            document.getElementsByTagName('input');
        for (var e = 0; e < all.length; e++)
        if (all[e].className.indexOf("rollover")>-1)
        {
            all[e].onmouseover = function(){rollover(this, true)};
            all[e].onmouseout = function(){rollover(this, false)};
        }
    }