//compatible with IE, NN 6+, Mozilla 1+
ie = (navigator.appName == "Netscape")?false:true;

function show(id)   //id = the id of the div
{
    if(ie)
    {
        document.all[id].style.visibility = "visible";
    }
    else
    {
        d = document.getElementById(id);
        d.style.visibility = "visible";
    }
}

function hide(id)
{
     if(ie)
    {
        document.all[id].style.visibility = "hidden";
    }
    else
    {
        d = document.getElementById(id);
        d.style.visibility = "hidden";
    }

}