var DHTML=(document.getElementById || document.all || document.layers);
function getObj(name)
{
if (document.getElementByID)
{
this.obj=document.getElementById(name);
this.style=document.getElementById(name).style;
}
else if (document.all)
{
this.obj=document.all[name];
this.style=document.all[name].style;
}
else if (document.layers)
{
this.obj=document.layers[name];
this.style=document.layers[name];
}
}

function showmenu(mm)
{
var x=new getObj(mm);

if(document.layers){

document.x.visibility="visible";
}
if(document.all){

x.style.visibility="visible";
}
if(!document.all && document.getElementById){

document.getElementById(mm).style.visibility="visible";
}
}



function hidemenu(mm)
{
var x=new getObj(mm);

if(document.layers){

document.x.visibility="hidden";
}
if(document.all){

x.style.visibility="hidden";
}
if(!document.all && document.getElementById){
document.getElementById(mm).style.visibility="hidden";
}

}