var http_request = false;
   
   function makePOSTRequest(url, parameters) {
   
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
          alert('Cannot create XMLHTTP instance');
         return false;
      }
      
      http_request.onreadystatechange = alertContents;
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }

   function alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            // alert(http_request.responseText);
			result = http_request.responseText;
			var  res = document.getElementById("LPResult");
			res.style.display = "block";
			var  sh = document.getElementById("LPShadow");
			sh.innerHTML = result;  
			// alert('Preview is done!');

         } else {
            alert('Er is een probleem opgetreden bij het maken van de preview.');
         }
      }
   }
   
   function getPreview(obj) {
	  // alert('starting Preview');
	  var poststr = "query=" + encodeURI( document.getElementById("nucleus_cf_body").value ) ;
	  // alert('poststr = ' + poststr);
      makePOSTRequest('http://www.gorissen.info/Pierre/livepreview.php', poststr);
   }