function studio_nav_toggle(el){
	try{
		var oEl = document.getElementById(el);
		var oItems = oEl.parentNode.getElementsByTagName(oEl.nodeName.toLowerCase());
		if (oEl.style.display != "block"){
			for (var i = 0; i < oItems.length; i++){
				if (oItems[i].id != el){
					oItems[i].style.display = "none";
				}
			}
			oEl.style.display = "block";
		}
		else{
			for (var i = 0; i < oItems.length; i++){
				if (oItems[i].className != oEl.className){
					oItems[i].style.display = oItems[i].nodeName.toLowerCase() == "li" ? "list-item" : "block";
				}
			}
			oEl.style.display = "none";
		}
	}
	catch (e){alert(e);}
}