function loader() {
	/* Breite und Höhe des Maskierungs-DIV's auslesen */
	var divH = document.getElementById('loaderbereich').offsetHeight;
	var divW = document.getElementById('loaderbereich').offsetWidth;

	/* Linke und obere Position des Loader GIF berechnen und setzen */
	var imgTop = (divH / 2) - (document.getElementById('loadergif').height / 2);
	var imgLeft = (divW / 2) - (document.getElementById('loadergif').width / 2);
	document.getElementById('loadergif').style.left = imgLeft;
	document.getElementById('loadergif').style.top = imgTop;

	/* dislay="hidden" vom Bild löschen */
	document.getElementById('loadergif').style.display = "inline";

	/* den transparenten DIV einblenden und höhe und breite setzen */
	document.getElementById('loader').style.width = divW + "px";
	document.getElementById('loader').style.height = divH + "px";
	document.getElementById('loader').style.display = "inline";
}

function unloader() {
	/* alles zurücksetzen und ausblenden */
	document.getElementById('loader').style.width = "0px";
	document.getElementById('loader').style.height = "0px";
	document.getElementById('loader').style.display = "none";
	document.getElementById('loadergif').style.display = "none";
}

   
   var http_request = false;
   function makePOSTRequest2(url, parameters) {
      http_request = false;
      if (window.XMLHttpRequest) { 
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
            //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 = alertContents2;
      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 alertContents2() {
      if (http_request.readyState == 4) {
	  
         if (http_request.status == 200) {
            //alert(http_request.responseText);
            result = http_request.responseText;
            document.getElementById('hd_ajx_2').innerHTML = result;            
         } else {
           alert('There was a problem with the request.');
         }
      }
   }
   
   function get2(obj) {
      var strg = 
	  "send=1";
	 
	 if (obj == "sort_angebot") {	  
	 if (document.getElementById("sort_angebot")) { strg += "&sort_angebot=" + encodeURI(document.getElementById("sort_angebot").value); }
	 }
	 
     if (obj == "sort_bereich") {	  
	 if (document.getElementById("sort_bereich")) { strg += "&sort_bereich=" + encodeURI(document.getElementById("sort_bereich").value); }
	 }

     if (obj == "sort_preis_value") {	
	 if (document.getElementById("sort_preis_value")) { strg += "&sort_preis_value=" + encodeURI(document.getElementById("sort_preis_value").value); }
	 }
	 
     if ( !isNaN( parseFloat(obj))) {	
	 strg += "&newstart=" + obj;
	 }

loader();

				  makePOSTRequest2('inc/ajx/angebote_ajx.php', strg);
				  
unloader();				  
   }