var http_request = false;
var targetDiv = '';

   function makeGetRequest(url, parameters, funcname) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
            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;
      }
      if (funcname!=null && typeof(funcname) == "string") {
      	http_request.onreadystatechange = eval(funcname);
      }
      else {
      	http_request.onreadystatechange = alertContents;
      }
      http_request.open('GET', url + parameters, true);
      http_request.send(null);
   }

   function alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {

            var xmldoc = http_request.responseText;
            displayResponse(xmldoc);
            
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   
   function getAjax( targetDiv_, url, params, funcname) {
      targetDiv = targetDiv_;
      makeGetRequest(url, '?'+params, funcname);
      return true;
   }
   
   function displayResponse(data) {
	   if (document.getElementById(targetDiv)) {
		   var cntDiv = document.getElementById(targetDiv);
		   cntDiv.innerHTML = urlDecode(data);
		   if (document.getElementById('control')) {
		   	document.getElementById('control').innerHTML = 'weiter';
		   }
		   if (document.getElementById('pagesDiv')) {
		   	document.getElementById('pagesDiv').innerHTML = 'Frage ' + (rightAnswers.length + wrongAnswers.length + 1) + ' von ' + numQuestions + '<br/><br/>';
		   }
		   /** 
		   	* data ware house manger
		   	* controls export of address data
		   	*/
		   if (data.length > 0 && document.getElementById('dw-address-control')) {
		   		document.getElementById('dw-address-control').innerHTML = '<div class="dw-address-control">' + 
																		  '<input type="button" name="dw_submitMailExport" id="dw_submitMailExport" value="Export" title="Export" class="cms-btn neutral" onclick="dataExport(this.form.id);"/><br/><br/>' +
																		  'CSV: <input type="radio" name="dw_exptype" id="dw_exptype" value="csv" title="CSV" checked="true" />' +
																		  '&nbsp;&nbsp;&nbsp;&nbsp;XML: <input type="radio" name="dw_exptype" id="dw_exptype" value="xml" title="XML" /> ' + 
																		  '&nbsp;&nbsp;&nbsp;&nbsp;Newsletter: <input type="checkbox" name="dw_onlyEmails" id="dw_onlyEmails" value="newsletter" title="Newsletter" /><br/>' +
																		  '</div>';
		   }
	   }
   }