var newwindow;
function popup(url, width, height) {
  var top;
  var left;

  var dependent; 
  var directories;
  var fullscreen; 
  var location; 
  var menubar; 
  var resizable;

  var scrollbars;
  var status; 
  var toolbar;

  dependent = 'no';
  directories = 'no';
  fullscreen = 'no';
  location = 'no';
  menubar = 'no';
  resizable = 'no';

  scrollbars = 'yes';
  status = 'yes';
  toolbar = 'yes';
  
  
  if (windowHeight() > 0) {
    top = windowHeight()/2 - parseInt(height)/2;
  }
  if (windowWidth() > 0) {
    left = windowWidth()/2 - parseInt(width)/2;
  }
  
  var properties = 'width='+width+',height='+height+',top='+top+',left='+left+',scrollbars=yes';
  <!-- alert(properties);  -->
  newwindow=window.open(url,'name',properties);
  newwindow.focus();
  return;
}

function windowHeight() {
  var height;
  if (self.innerWidth)
  {
    height = self.innerHeight;
  }
  else if (document.documentElement && document.documentElement.clientWidth)
  {
    height = document.documentElement.clientHeight;
  }
  else if (document.body)
  {
    height = document.body.clientHeight;
  }
  else height = 0;
  
  <!-- alert(height); -->
  return height;
}

function windowWidth() {
  var widht;
  if (self.innerWidth)
  {
    width = self.innerWidth;
  }
  else if (document.documentElement && document.documentElement.clientWidth)
  {
    width = document.documentElement.clientWidth;
  }
  else if (document.body)
  {
    width = document.body.clientWidth;
  }
  else width = 0;
  
  <!-- alert(width); -->
  return width;
}

function resizeIFrameHeight(iframe)
{
  if(document.getElementById) {
    //find the height of the internal page
    var the_height=
      document.getElementById(iframe).contentWindow.
        document.body.scrollHeight;

    //change the height of the iframe
    document.getElementById(iframe).height = the_height;
    document.getElementById(iframe).style.overflow = "hidden";
  }
}


function OpenRoute(href)
{
  var uri = new Array();
  var querysting = new Array();
  var paramKeys = new Array();
  var params = "";

  var i,j;

  // Toegestane parameters voor de window.open functie
  paramKeys.push("width", "height");

  // Meegegeven href splitten in een uri en een querystring
  uri = href.split('?');
  querysting = uri[1].split('&');

  // Toegestane parameters uit de querystring filteren en params string opbouwen
  for(i=0; i<querysting.length; i++)
  {
    for(j=0; j<paramKeys.length; j++)
    {
      if(querysting[i].indexOf(paramKeys[j]) != -1)
      {
        params += querysting[i] + ",";
      }
    }
  }
  // Laatste komma erafhalen
  params = params.substring(0, params.length-1);

  // Window openen en focus zetten
  var wnd = window.open(href, "route", "," + params);
  if (wnd) wnd.focus()
}


function resizeIFrameHeight(id)
{
    if(document.getElementById) {
      //find the height of the internal page
      var the_height = document.getElementById(id).contentWindow.document.body.scrollHeight;

      //change the height of the iframe
      document.getElementById(id).height = the_height;
      document.getElementById(id).style.overflow = "hidden";
    }
}


sfHover = function() {
	if(document.getElementById("nav"))
	{
	    if(document.getElementById("nav").getElementsByTagName("LI"))
	    {
	        var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	        for (var i=0; i<sfEls.length; i++) {
		        sfEls[i].onmouseover=function() {
			        this.className+=" sfhover";
		        }
		        sfEls[i].onmouseout=function() {
			        this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		        }
	        }
	    }
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);