var http_request = false;
function jin_ajax_req(url,target) {
 
        http_request = false;
 
        if (window.XMLHttpRequest) { // Mozilla, Safari,...
            http_request = new XMLHttpRequest();
            if (http_request.overrideMimeType) {
                http_request.overrideMimeType('text/xml');
                //http_request.overrideMimeType('multipart/form-data');
                // zu dieser Zeile siehe weiter unten
            }
        } 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('Ende :(');
            return false;
        }
        http_request.onreadystatechange = alertInhalt;
        http_request.open('GET', url, true);
        http_request.send(null);
 
 function alertInhalt() {
        if (http_request.readyState == 4) {
              var answer = http_request.responseText;
              if(document.getElementById(target).innerHTML != answer){
                document.getElementById(target).innerHTML = answer;
              }
              else{
                document.getElementById(target).innerHTML = "";
              }
        } else {
         document.getElementById(target).innerHTML = "Loading...";
        }
 }

}
// end