function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
 document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

var vorige = -1;
function hideVorige() {
	if (vorige != -1) {
		MM_showHideLayers('submenu'+vorige,'','hide');
		selects(true);
	}
}

function menu(num, vis) {
	hideVorige();	
	var layernaam = 'submenu'+num
	if (vis) {
		MM_showHideLayers(layernaam,'','show');
		selects(false);
	} else {
		MM_showHideLayers(layernaam,'','hide');	
		selects(true);
	}
	vorige = num;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
 d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() {
	var i,p,v,obj,args=MM_showHideLayers.arguments;
	for (i=0; i<(args.length-2); i+=3) {
		if ((obj=MM_findObj(args[i]))!=null) { 
			v=args[i+2];
			if (obj.style) {
			 	obj=obj.style;
				v = (v=='show') ? 'inline' : (v=='hide') ? 'none' : v; 
			}
			obj.display=v;
		}
	}
}


function selects(zichtbaar) {
	
	var myDocumentElements = document.getElementsByTagName("select");
	for (i=0;i < myDocumentElements.length;i++) {
		if (zichtbaar) {
			myDocumentElements[i].style.visibility = "visible";
		} else {
			myDocumentElements[i].style.visibility = "hidden";
		}
	}
}