// Menu (c) 2005 OntwerpKracht (www.ontwerpkracht.nl)

var vorigId = "";
var vorigElemId = "";
var bgId = "";

function menu(elemId) { 

if (elemId!="") {   

    hetId = document.getElementById(elemId);  


		if (vorigId=="") { 	hetId.style.display = "block"; vorigId = hetId; vorigElemId = elemId;
							bgId = elemId + "_btn"; 
							document.getElementById(bgId).style.background = "url(/i/layout/" + bgId + "_down.gif)";
 		}
		
		else if (vorigId == hetId) { 	vorigId.style.display = "none"; 
										bgId = elemId + "_btn"; vorigId = "";
										document.getElementById(bgId).style.background = "url(/i/layout/" + bgId + ".gif)";
		}
		
		else { 	vorigId.style.display = "none"; hetId.style.display = "block"; vorigId = hetId; 
				bgId = elemId + "_btn"; 
				document.getElementById(bgId).style.background = "url(/i/layout/" + bgId + "_down.gif)";
				bgId = vorigElemId + "_btn"; 
				document.getElementById(bgId).style.background = "url(/i/layout/" + bgId + ".gif)"; 
				vorigElemId = elemId;
		}
		
	
	}
}