function initNav()
{
	var lis = document.getElementById("cataloge");
	if( lis != null ) {
		var lis = document.getElementById("cataloge").getElementsByTagName("a");
		for (var i = 0; i < lis.length; i++)
		{
			if (lis[i].parentNode.getElementsByTagName("ul").length > 0)
			{
				lis[i].onclick = function ()
				{
					var parent = this.parentNode;
					if (parent.className.indexOf("open") != -1 )
					{
						parent.className = parent.className.replace("open", "");
					}
					else
					{
						parent.className += " open";
					}
				}
			}
		}
	}
}

if (window.addEventListener)
	window.addEventListener("load", initNav, false);
else if (window.attachEvent && !window.opera)
	window.attachEvent("onload", initNav);