var ie=(document.all)?true:false;
var mz=(document.getElementById && !ie)?true:false;
var ns=(document.layers)?true:false;
var timerID = null;


function menu(secNum){
if(mz)
{
document.getElementById('lnk1').style.visibility=(secNum=='lnk1')?'':'hidden';
document.getElementById('lnk2').style.visibility=(secNum=='lnk2')?'':'hidden';
document.getElementById('lnk3').style.visibility=(secNum=='lnk3')?'':'hidden';
}
else if(ie)
{
lnk1.style.visibility = (secNum=='lnk1')?"":"hidden";
lnk2.style.visibility = (secNum=='lnk2')?"":"hidden";
lnk3.style.visibility = (secNum=='lnk3')?"":"hidden";
}
else
{
document.lnk1.visibility = (secNum=='lnk1')?"show":"hide";
document.lnk2.visibility = (secNum=='lnk2')?"show":"hide";
document.lnk3.visibility = (secNum=='lnk3')?"show":"hide";

}

}

function timer(secNum){
if(mz)
timerID = setTimeout('document.getElementById("'+secNum+'").style.visibility="hidden"','500');
else if(ie)
timerID = setTimeout(secNum+'.style.visibility="hidden"','500');
else
timerID = setTimeout('document.'+secNum+'.visibility="hide"','500');
}

function subMenu(){
clearTimeout(timerID)
}