var TH;
var ST=new Array(6);
function showST(i)
{
	if (TH)
		clearTimeout(TH);
	for (j=1;j<4;j++){
		if (i == j){
			document.getElementById('pop_menu' + j).style.display = 'block';
			ST[j] = '1';
		}else{
			document.getElementById('pop_menu' + j).style.display = 'none';	
			ST[j] = '0';
		}
	}
	if (TH)
		clearTimeout(TH);
}

function hidST(i)
{
	ST[i] = '0';
	TH = setTimeout("closeST(" + i + ")",2000);
}

function closeST(i)
{
	if (ST[i] == '0')
		document.getElementById('pop_menu' + i).style.display = 'none';
}