var query = location.href.substring((location.href.indexOf('?')+1), location.href.length);
	if(location.href.indexOf('?') < 0) query = 'M=0';
	querysplit = query.split('&');
	query = new Array();

	for(var i = 0; i < querysplit.length; i++){
		var namevalue = querysplit[i].split('=');
		if (namevalue=='') {
			namevalue="M,0";
		}
		//namevalue[1] = namevalue[1].replace(/\+/g, ' ');
		query[namevalue[0]] = unescape(namevalue[1]);
	}
	
	window.onload = function(){
	// Do stuff with query string data here.
		openMenu(query['M']);
	}
	
	function showMenu(menuID) {
		var arrHoofdmenu = new Array();
		var maxHoofdmenu = 19;
		var strDisplay;

		if (document.getElementById('div_menu'+menuID)) {
			document.getElementById('div_menu0').style.display = 'none';
		}
		else {
			document.getElementById('div_menu0').style.display = 'block';
		}
		
		for (var i=1; i<=maxHoofdmenu; i++) {
			// alle selected knopstatussen terug afzetten
			if (document.getElementById('btn'+i)) document.getElementById('btn'+i).className = document.getElementById('btn'+i).className.replace(" topselected", "");
			
			if (i==menuID) {
				strDisplay = 'block';
			}
			else {
				strDisplay = 'none';
			}
			if (document.getElementById('div_menu'+i)) {
				document.getElementById('div_menu'+i).style.display = strDisplay;
			}
		}
		
		if (document.getElementById('btn'+menuID)) {
			document.getElementById('btn'+menuID).className = document.getElementById('btn'+menuID).className + ' topselected';
		}
	}
	
	function openMenu(menuID) {
		maxmenu = arrParent.length - 1;
		var i;
		// alle andere arrParent's worden via vbscript opgevuld. Dit is de openingspagina.		
		arrParent[0] = "13";
		// --- START: eerst alle submenu's toeklappen
		for (i=0; i<=maxmenu; i++) {
			if (document.getElementById('submenu'+i)) {
				document.getElementById('submenu'+i).style.display = 'none';
			}
		}
		// ---- END: eerst alle submenu's toeklappen
		
		
		for (i=0; i<=maxmenu; i++) {
			if (menuID==i) {
				var selParent = arrParent[i];
				var arrSubParent = selParent.split("|");
				showMenu(arrSubParent[0]);
				if (document.getElementById('submenu'+arrSubParent[1])) {
					document.getElementById('submenu'+arrSubParent[1]).style.display = 'block';
				}
				if (document.getElementById('submenu'+arrSubParent[2])) {
					document.getElementById('submenu'+arrSubParent[2]).style.display = 'block';
				}
			}
		}
	}