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);

   /* GET? // http://www.experts-exchange.com/Programming/Languages/Scripting/JavaScript/Q_23316416.html
  	xmlhttp.open("GET", "pagina.html?waarde=0&user=eduard&dit=test", true);
  	xmlhttp.onreadystatechange=verwerk
  	xmlhttp.send(null)
   */

}

function alertContents() {
   if (http_request.readyState == 4) {
      if (http_request.status == 200) {
         //alert(http_request.responseText);
         result = http_request.responseText;
         document.getElementById('myspan').innerHTML = result;
      } else {
         alert('There was a problem with the request.');
      }
   }
}

function get(obj) {
	var poststr = "weergave=true";
 	var eduard = location.href;
   	makePOSTRequest(eduard, poststr);
}