function $(id){
    return document.all?document.all[id]:document.getElementById(id);
}
function newImgCode(){
    img = $("img_code");
    img.src = "/code.php?rnd="+Math.round((Math.random()*1000000));
}
function toogle(id){
    var e = $(id);
    if (e) e.className = (e.className == "visible" ? "hidden" : "visible");
}