function generate(sLongURL, sCustomURL, objMyDivOutput) {
   // creating request
   var req = null;

   try {
      req = new XMLHttpRequest();
   }
   catch (ms) {
      try {
         req = new ActiveXObject("Msxml2.XMLHTTP");
      }
      catch (nonms) {
         try {
            req = new ActiveXObject("Microsoft.XMLHTTP");
         }
         catch (failed) {
            req = null;
         }
      }
   }

   if (req == null) {
     // error
   }

   // set nice text
   if (objMyDivOutput != null) {
      objMyDivOutput.style.display = 'block';
      objMyDivOutput.innerHTML = '<span>berechne...</span>';
   }

   // doing request (GET, url, request is asynchronous)
   req.open('GET', 'http://linkd.de/_jx?longurl=' + escape(sLongURL) + '&customurl=' + escape(sCustomURL), true);
   // called when request changes state
   req.onreadystatechange = function() {
      switch(req.readyState) {
         case 4 : if(req.status != 200) {
            // error
         }
         else {
            // write the response in html
            objMyDivOutput.innerHTML = getDivHTML(req.responseText);
         }
         break;
         default : return false;
         break;
      }
    };

   req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
   req.send(null);
}

function getDivHTML(sShortURLResponse) {
	var aData = eval('(' + sShortURLResponse + ')');
	var s = '';

	if (!aData.bValidURL) {
		return s = '<h2>fehler</h2>' + '<span>bitte geben sie einen g&uuml;ltigen url an</span>';
	}

	if ((aData.bCustomURL) && (!aData.bCustomURLValid)) {
		return s = '<h2>fehler</h2>' + '<span>g&uuml;ltige zeichen f&uuml;r das k&uuml;rzel: a-z, 0-9 und bindestrich</span>';
	}

	if ((aData.bCustomURL) && (aData.bCustomURLValid) && (!aData.bCustomURLAvailable)) {
		s = s + '<span>das k&uuml;rzel war leider nicht mehr verf&uuml;gbar</span><br /> <br />';
	}

	if (aData.bCustomURLAvailable) {
		s = s + '<span>(wunschk&uuml;rzel erfolgreich)</span><br /> <br />';
	}
	
	s = s + '<h2>kurzer url</h2>' + '<span>kurzer URL: <br />http://linkd.de/' + aData.sShortURL + '<br /> <br />kurzer URL mit Vorschau: <br />http://linkd.de/' + aData.sShortURL + '+<br /></span>';
	
	return s;

}