openmenus = [];
close_timer = null;

menMargLeft = 80;
menMargTop = 0;
menuWidth = 85;

function findPosX(obj) {
	var curleft = 0;
	if (obj.offsetParent) {
		while (obj.offsetParent) {
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	} else if (obj.x) {
		curleft += obj.x;
	}
	return curleft;
}

function findPosY(obj) {
	var curtop = 0;
	if (obj.offsetParent) {
		while (obj.offsetParent) {
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	} else if (obj.y) {
		curtop += obj.y;
	}
	return curtop;
}

function over_hoofdmenu(menunummer) {
	sluit_boom(0);

	hoofdmenunaam = 'hoofdmenu'+menunummer;
	menunaam = 'menu'+menunummer;

	hoofdmenu = document.getElementById(hoofdmenunaam);
	menu = document.getElementById(menunaam);

	// indien er geen submenu's zijn return
	if (menu == null) {
		return;
	}

	menu.style.left = menMargLeft + findPosX(hoofdmenu) + 'px';			// body margin + x
	menu.style.top = 0 + menMargTop + 0 + findPosY(hoofdmenu) + 'px';	// body margin + height + border + y
	menu.style.display = 'block';

	openmenus.push(menu);
}

function over_menuitem(itemnummer, niveau) {
	sluit_boom(niveau - 1);

	menuitemnaam = 'item' + itemnummer;
	submenunaam = 'menu' + itemnummer;

	menuitem = document.getElementById(menuitemnaam);
	submenu = document.getElementById(submenunaam);

	if (submenu == null) {
		return;
	}

	submenu.style.left = menuWidth + findPosX(menuitem) + 'px';	// width + x
	submenu.style.top = findPosY(menuitem) + 'px';			// y
	submenu.style.display = 'block';

	openmenus.push(submenu)
}

function sluit_boom(niveau) {
	while (openmenus.length > niveau) {
		menu = openmenus.pop();
		menu.style.display = 'none';
	}
}

function start_close_timer() {
	if (close_timer == null) {
		close_timer = setTimeout("sluit_boom(0)", 1000);
	}
}

function stop_close_timer() {
	if (close_timer != null) {
		clearTimeout(close_timer);
		close_timer = null;
	}
}

var type = "IE";	//Variable used to hold the browser name
BrowserSniffer();
//detects the capabilities of the browser
function BrowserSniffer() {
	if (navigator.userAgent.indexOf("Opera")!=-1 && document.getElementById) type="OP";		//Opera
	else if (document.all) type="IE";														//Internet Explorer e.g. IE4 upwards
	else if (document.layers) type="NN";													//Netscape Communicator 4
	else if (!document.all && document.getElementById) type="MO";							//Mozila e.g. Netscape 6 upwards
	else type = "IE";		//I assume it will not get here
}

function getLayer(name) {

  // Returns a handle to the named layer.

  if (document.layers)
    return(document.layers[name]);
  else if (document.all) {
    layer = eval('document.all.' + name + '.style');
    //alert (layer.id);
    return(layer);
   //return (document.getElementById(name))
  }
  else
    {
      return (document.getElementById(name))
      //return(null);
    }
}
//Show and hide a layer
//id is the name of the layer
//action is either hidden or visible
//Seems to work with all versions NN4 plus other browsers
function showLayer(id, action){
	if (type=="IE") eval("document.all." + id + ".style.visibility='" + action + "'");
	if (type=="NN") eval("document." + id + ".visibility='" + action + "'");
	if (type=="MO" || type=="OP") eval("document.getElementById('" + id + "').style.visibility='" + action + "'");
}

function hideLayer(id){
	if (type=="IE") eval("document.all." + id + ".style.visibility='hidden'");
	if (type=="NN") eval("document." + id + ".visibility='hide'");
	if (type=="MO" || type=="OP") eval("document.getElementById('" + id + "').style.visibility='hidden'");
}
function zoeken(){
	document.formulier.submit();
}

function verstuur(velden){ 
   var argv = verstuur.arguments;
   var argc = (verstuur.arguments.length)/3 
   //1=veldnaam, 2=naam, 3=type
   for(i=0;i<argc;i++) {
		 
		  fld = eval('document.formulier.' + argv[i])
	    if(fld.value==''){ 
	      alert (argv[i+argc]+' is verplicht')
	      fld.focus();
	      return;
	    }else{
   			if(argv[i+(2*argc)]=='3'){ //email
  	      val = fld.value.indexOf(' ') == -1 //geen spaties
  				val &= fld.value.indexOf('@') > 0 //er zit een @ in
  				val &= fld.value.indexOf('@') == fld.value.lastIndexOf('@') //slechts 1 @
  				val &= fld.value.indexOf('@') < fld.value.lastIndexOf('.') //een @ voor een punt
  				val &= fld.value.lastIndexOf('.') < fld.value.length-2 //twee letters achter de punt
  				if (!val){  				  
    				alert ('Er is geen geldig email adres ingevuld')
    	      fld.focus();
    	      return;
    	     }
    	     if(document.formulier.vanemail){document.formulier.vanemail.value=fld.value}
  			}
	    }
		  
    }
  document.formulier.submit()
}
  
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 openwin(page, w, h) {
	feat='width=' + w + ', height=' + h + ',status=1, scrollbars=1, resizable=1'
  	window.open(page, 'Popup',feat)
}


function zenden(){
	if(document.sendform.naam.value==""){
		alert("Het formulier is niet compleet ingevuld. Uw naam is verplicht")
		document.sendform.naam.focus();
	}else{
		if((document.sendform.email.value == "") || (document.sendform.email.value.indexOf('@') == -1) || (document.sendform.email.value.indexOf('.') == -1)) {
		  alert("Het formulier is niet compleet ingevuld. Uw e-mail adres is verplicht")
		  document.sendform.email.focus();
		  return;
		}
	
		document.sendform.submit()
	}
}
function doAanmelden(){
	if(document.sendform.naam.value==""){
		alert("Het formulier is niet compleet ingevuld. Uw naam is verplicht")
		document.sendform.naam.focus();
	}else{
		
		if(document.sendform.email.value == "") {
		  alert("Uw e-mail adres is verplicht")
		  document.sendform.email.focus();
		  return;
		} else	{
				val = document.sendform.email.value.indexOf(' ') == -1 //geen spaties
  				val &= document.sendform.email.value.indexOf('@') > 0 //er zit een @ in
  				val &= document.sendform.email.value.indexOf('@') == document.sendform.email.value.lastIndexOf('@') //slechts 1 @
  				val &= document.sendform.email.value.indexOf('@') < document.sendform.email.value.lastIndexOf('.') //een @ voor een punt
  				val &= document.sendform.email.value.lastIndexOf('.') < document.sendform.email.value.length-2 //twee letters achter de punt
  				if (!val){  				  
    				alert ('Er is geen geldig email adres ingevuld')
	    	      document.sendform.email.focus();
	    	      return;
    	      }
		}
		document.sendform.submit()
	}
}


function volgende(page) {
	document.cat.page.value = page;
	document.cat.id.value = 0;
	anderePagina(1);
}
function vorige(page) {
	document.cat.page.value = page;
	document.cat.id.value = 0;
	anderePagina(-1);           
}

function andereCat(){
	document.cat.page.value = 0;
	document.cat.sc.value = 0;
	document.cat.id.value = 0;
	document.cat.submit();
}