image = new Array ()
var disabled;
var done;

	function preload ()
	{
		base = 'www/images/knoppen/';

		imageArray = new Array (
			''
			)

		for (i = 0; i < imageArray.length; i++)
		{
			filename = imageArray[i] + '_0.gif';
			image[filename] = new Image ();
			image[filename].src = base + filename;
			
			filename = imageArray[i] + '_1.gif';
			image[filename] = new Image ();
			image[filename].src = base + filename;
		}
		
		done = true;
	}

	function swap (name, state)
	{
		if (name != disabled && done)
			document[name].src = image[name + '_' + state + '.gif'].src;
	}
	
	function disable (name)
	{
		disabled = name;
	}

  var d = document;
  var wH; // window handler

  function zoom2(pad,naam,id,pag)
  {
	foto = new Image;
	foto.src = pad;
	w = d[naam].width;
    alert(w);
  }
  
  function zoom(pad,img,id,pag,schaling)
  {
	foto = new Image;
	foto.src = pad;

	w = Math.round(d[img].width * schaling); // foto.width <- IE4;
	h = Math.round(d[img].height * schaling) + 50; // foto.height <- IE4;
	
	x = (screen.width - w) / 2;
	y = (screen.height - h) / 2;

	url = pag + '&id=' + id + '&w=' + w + '&h=' + h;
	options = "width=" + w + ",height=" + h + ",left=" + x + ",top=" + y + ",scrollbars=no";

	wH = window.open (url, 'image', options);
	if (!wH) wH.opener = self;
  }

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

function openVenster(url, naampag, w, h, scroll) 
{
 var winl = (screen.width - w) / 2;

if (h == '*') {

 if ((screen.availHeight - 10) > 700) 
	{
	 var winh = 700;
	 var wint = ((screen.availHeight - 30) - winh) / 2;
    } else {
	 var winh = screen.availHeight - 30;
	 var wint = 0;
	}

  } else {
	 var winh = h;
	 var wint = ((screen.availHeight - 30) - h) / 2;
	}
	
 winprops = 'height='+winh+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
 win = window.open(url, naampag, winprops)
 if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}
 
function groteFoto(pid,sid,tid,fid) 
{
 	var url = '/?pag_id=' + pid + '&site_id=' + sid + '&dr=zm' + '&tid=' + tid + '&fid=' + fid;
		openVenster(url,'popupwin','670','*','yes');	
}

function groteFotoSlide(pid,sid,tid,fid) 
{
 	var url = '/?pag_id=' + pid + '&site_id=' + sid + '&dr=sl' + '&tid=' + tid + '&fid=' + fid;
		openVenster(url,'popupwin','670','*','yes');	
}

function groteFotoPres(pid,sid,tid,fid) 
{
 	var url = '/?pag_id=' + pid + '&site_id=' + sid + '&dr=slg' + '&tid=' + tid + '&fid=' + fid;
		openVenster(url,'popupwin','670','*','yes');	
}

function groteFotoNieuws(pid,sid,nid,fid) 
{
 	var url = '/?pag_id=' + pid + '&site_id=' + sid + '&dr=zm' + '&nid=' + nid + '&fid=' + fid;
		openVenster(url,'popupwin','670','*','yes');	
}