function SwitchMenu(obj){
    if(document.getElementById){
        var el = document.getElementById(obj);
        var ar = document.getElementById("masterdiv").getElementsByTagName("span"); //DynamicDrive.com change
        if(el.style.display != "block"){ //DynamicDrive.com change
            for (var i=0; i<ar.length; i++){
                if (ar[i].className=="submenu") //DynamicDrive.com change
                ar[i].style.display = "none";
            }
            el.style.display = "block";
        }else{
            el.style.display = "none";
        }
    }
}

if (document.getElementById){ //DynamicDrive.com change
document.write('<style type="text/css">\n')
            document.write('.submenu{display: none;}\n')
            document.write('</style>\n')
}