//dynamic navigation
initNav = function() {
	var navRoot = document.getElementById("left-nav");
	var lis = navRoot.getElementsByTagName("li");
	for (var i=0; i<lis.length; i++)
	{
		var spans = lis[i].getElementsByTagName("span");
		for (var j=0; j<spans.length; j++)
		{
			spans[j].onclick = function()
			{
				if ( this.parentNode.className == "active") this.parentNode.className = this.parentNode.className.replace("active", "")
				else this.parentNode.className = "active";
			}
		}
	}
}
if (window.addEventListener)
	window.addEventListener("load",  initNav, false);
else if (window.attachEvent)
	window.attachEvent("onload",  initNav);