var ua = navigator.userAgent.toLowerCase();
var isIE = ((ua.indexOf("msie") != -1) && (ua.indexOf("opera") == -1) && (ua.indexOf("webtv") == -1)); 

function ThumbPopup(url) { 
  Popup("includes/ThumbPopup.asp?" + url);
}

function Popup(url, naam, details) { 
  if (details == undefined) { details = "resizable=0,height=200,width=200"}
  if (naam == undefined) {
    now = new Date()
    naam = "" + now.getDate() + now.getMonth() + now.getFullYear() + now.getHours() + now.getMinutes() + now.getSeconds()
  }
  window.open(url, naam, details)
}

function ToggleLayer(id, display) {
  var object = document.getElementById(id).style
  if (display != undefined) {
    object.display = display
  } else {
    if (object.display == 'none') {object.display = ''} else {object.display = 'none'}	
  }
}

function wijzigTaal() {

	var change
    change = document.getElementById("change")
	
	if (document.getElementById("nederlands").style.display == "block")	{
		change.src = "images/taal/change.png"
		change.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/taal/change.png', sizingMethod='crop');" 
        if (isIE) { change.src = "images/blank.gif" }
		change.height = 22
		ToggleLayer("nederlands","none")
		ToggleLayer("english","none")
	} else {
		change.src = "images/taal/change2.png"
		change.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/taal/change2.png', sizingMethod='crop');" 
        if (isIE) { change.src = "images/blank.gif" }
		change.height = 19
		ToggleLayer("nederlands","block")
		ToggleLayer("english","block")
	}
}