(document.layers) ? layerobject=true : layerobject=false;
(document.all) ? allobject = true: allobject = false;
(document.getElementById) ? dom = true : dom = false;
function changeVisibility(id,action)
{
switch (action)
{
case "show":
if (layerobject)
document.layers[''+id+''].visibility = "show";
else if (allobject)
document.all[''+id+''].style.visibility = "visible";
else if (dom)
document.getElementById(''+id+'').style.visibility = "visible";
break;
case "hide":
if (layerobject)
document.layers[''+id+''].visibility = "hide";
else if (allobject)
document.all[''+id+''].style.visibility = "hidden";
else if (dom)
document.getElementById(''+id+'').style.visibility = "hidden";
break;
default:return;
}
return;
}

function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}