function openPage(pageId, qs) {
  loc = '/web/show?id='+pageId + qs;
  window.location = loc;
}

function openURL(url) {
  window.open(url);
}

// (C) 2000 www.CodeLifter.com
// http://www.codelifter.com
// Free for all users, but leave in this  header
// NS4-6,IE4-6
// Fade effect only in IE; degrades gracefully

// =======================================
// set the following variables
// =======================================

// Set slideShowSpeed (milliseconds)
var slideShowSpeed = 5000

// Duration of crossfade (seconds)
var crossFadeDuration = 10

// Specify the image files
var Pic = new Array() // don't touch this
// to add more images, just continue
// the pattern, adding to the array below

Pic[0] = '/upload/header_bg_aardweten.jpg'
Pic[1] = '/upload/header_bg_bio.jpg'
Pic[2] = '/upload/header_bg_gezondheid.jpg'
Pic[3] = '/upload/header_bg_meteo.jpg'
Pic[4] = '/upload/header_bg_natuurkunde.jpg'
Pic[5] = '/upload/header_bg_ruimte.jpg'
Pic[6] = '/upload/header_bg_scheikunde.jpg'
Pic[7] = '/upload/header_bg_sterrenkunde.jpg'
Pic[8] = '/upload/header_bg_techniek.jpg'
Pic[9] = '/upload/header_bg_wiskunde.jpg'

// =======================================
// do not edit anything below this line
// =======================================

var t
var j = 0
var p = Pic.length

var preLoad = new Array()
for (i = 0; i < p; i++){
   preLoad[i] = new Image()
   preLoad[i].src = Pic[i]
}

function runSlideShow(){
   if (document.all){
     
      document.images.SlideShow.style.filter="blendTrans(duration=3 n)"
      document.images.SlideShow.filters.blendTrans.Apply()    
      
   }
   document.images.SlideShow.src = preLoad[j].src
  
  
  
   if (document.all){
      document.images.SlideShow.filters.blendTrans.Play()
   }
   j = j + 1
   if (j > (p-1)) j=0
   t = setTimeout('runSlideShow()', slideShowSpeed)
}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImagesArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (var i=0; i<array.length; i+=2) {
			img = null; var n = array[i];
			if (d.images) {img = d.images[n];}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (img) {img.src = array[i+1];}
		}
	}
}
function changeImages() {
	changeImagesArray(changeImages.arguments);
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_header_01_over = newImage('/upload/menu_over_home.png');
		pre_header_02_over = newImage('/upload/menu_over_contact.png');
		pre_header_03_over = newImage('/upload/menu_over_nieuwsbrief.png');
		pre_header_04_over = newImage('/upload/menu_over_overkennislink.png');
		preloadFlag = true;
	}
}