function hideimg()
{
    var imgs = document.getElementsByTagName("img");
    //var img_count = imgs.length;
    for (i = 0; i < imgs.length; i++)
    imgs[i].setAttribute("onContextMenu","return false;");
}
if (window.attachEvent) window.attachEvent("onload", hideimg)
else if (window.addEventListener) window.addEventListener("load", hideimg, false);
else window.setTimeout(hideimg, 500);