function initMenu()
{
	var nodes = document.getElementById("left-part").getElementsByTagName("h3");
	for (var i=0; i<nodes.length; i++)
	{
		nodes[i].onclick = function ()
		{
		if(this.parentNode.className.indexOf("active-part") !=-1)
		{
			this.parentNode.className = this.parentNode.className.replace("active-part", "");
			
		}
		else
		{
			this.parentNode.className += " active-part";
		}
		return false;
		}
	}
}

if (window.addEventListener) window.addEventListener("load", initMenu, false);
else if (window.attachEvent) window.attachEvent("onload", initMenu);