window.onload = function() {
	if(!document.getElementById || !document.getElementsByTagName) return false;
	for ( var i=0; i<4; i++){
		document.getElementById("treeMenu"+i).style.display = "none";
	}
}


function treeMenu(tName) {
	tMenu=(document.all)?document.all(tName).style:document.getElementById(tName).style;
	(tMenu.display=='none')?tMenu.display="block":tMenu.display="none";
}