var DHTML = (document.getElementById || document.all); //geen Netscape 4
var screensize = 0; //geeft drie schermformaten weer: 800, 1024 en 1280

//functions

function show(name)
{
	if (!DHTML) return;
	{
		var x = getObj(name);
		x.visibility = 'visible';
	}
}

function hide(name)
{
	if (!DHTML) return;
	{
		var x = getObj(name);
		x.visibility = 'hidden';
	}
}

function getObj(name)
{
  if (document.getElementById)
  {
    return document.getElementById(name).style;
  }
  else if (document.all)
  {
    return document.all[name].style;
  }
  else return false;
}

function detectscreensize() {
if (screen.width>=1280&&screen.height>=1024) {
screensize=1280;
}
else if (screen.width>=1024&&screen.height>=768) {
screensize=1024;
}
else {
screensize=800;
}
}

function getFile(pURL,targetdiv) {
   if (window.XMLHttpRequest) { // code for Mozilla, Safari, etc 
      xmlhttp=new XMLHttpRequest();
      xmlhttp.onreadystatechange=postFileReady(targetdiv);
      xmlhttp.open("GET", pURL, true);
      xmlhttp.send(null);
   } else if (window.ActiveXObject) { //IE 
      xmlhttp=new ActiveXObject('Microsoft.XMLHTTP'); 
      if (xmlhttp) {
         xmlhttp.onreadystatechange=postFileReady(targetdiv);
         xmlhttp.open('GET', pURL, false);
         xmlhttp.send();
      }
   }
}

// function to handle asynchronous call
function postFileReady(target) {
   if (xmlhttp.readyState==4) { 
      if (xmlhttp.status==200) { 
         document.getElementById(target).innerHTML=xmlhttp.responseText;
      }
   }
}