var timSpeed=10000, d=document, dom=d.getElementById?1:0, tmpMain=null, tmpSub=null;
function subNav(num){
	clearMainNav();
	clearSubNav();
	dom ? d.getElementById("SubNav" + num).style.visibility = "visible" : d["SubNav" + num].visibility = "visible";
}
function mainNav(num){
	clearMainNav();
	clearSubNav();
	dom ? d.getElementById("MainNav" + num).style.visibility = "visible" : d["MainNav" + num].visibility = "visible";
}
function killmain(){tmpMain = setTimeout('clearMainNav()',timSpeed);}
function clearMainNav(){clearTimeout(tmpMain); for(var i=1;i<=3;i++){dom ? d.getElementById("MainNav" + i).style.visibility = "hidden" : d["MainNav" + i].visibility = "hidden";}}
function killsub(){tmpSub = setTimeout('clearSubNav()',timSpeed);}
function clearSubNav(){clearTimeout(tmpSub); for(var i=1;i<=3;i++){dom ? d.getElementById("SubNav" + i).style.visibility = "hidden" : d["SubNav" + i].visibility = "hidden";}}