var t = null;

function showSub(id) {
	clearTimeout(t);
	hideAllSubs();
	document.getElementById(id).style.display = 'block';
}

function hideSub(id) {
	t = setTimeout("doHideSub('" + id + "')", 100);
}

function doHideSub(id) {
	document.getElementById(id).style.display = 'none';
}

function hideAllSubs() {
	var subs = [];
	subs[0] = 'sub_about';
	subs[1] = 'sub_real';
	subs[2] = 'sub_rentals';
	subs[3] = 'sub_communities';
	subs[4] = 'sub_area';
	for (var i = 0; i < subs.length; i++) {
		document.getElementById(subs[i]).style.display = 'none';
	}
}