/**
 * Opens a sub menu
 * @param menu
 * @return
 */
function OpenMenu(menu){
	var SubMenu = document.getElementById("SubMenu");
	var menuNodes = SubMenu.children;
	
	for(var x=0; x<menuNodes.length; x++){
		var node = menuNodes[x];
		
		var cls = node.className;
		
		if(cls.indexOf(menu) != -1){
			node.style.display = "";
		}
		else{
			node.style.display = "none";
		}
	}
}