var sub=0;
var subs=new Array();
	subs[0]="sub1";
	subs[1]="sub2";
	subs[2]="sub3";
	
function showSub(x){
	for(z in subs){
		document.getElementById(subs[z]).style.display="none";
	}
	document.getElementById(x).style.display="block";
}
	
function checkSub(x){
	sub=0;
	var t="closeSub('"+x+"')";
	window.setTimeout(t,500);
}
	
function closeSub(x){
	if(sub!=1){
		document.getElementById(x).style.display="none";	
	}
}