tms=new Array();

//Mostra o submenu no mouseover
function over(n){
    if(typeof(tms[n])!="undefined"){
		clearTimeout(tms[n]);
	}
    document.getElementById("s"+n).style.visibility="visible";
}
//Esconde o submenu no mouseout
function out(n){
    tms[n]=setTimeout('document.getElementById("s'+n+'").style.visibility="hidden"',500);
}