function loadXMLDoc() 
           { 
           if (window.XMLHttpRequest) 
             {// code for IE7+, Firefox, Chrome, Opera, Safari 
             xmlhttp=new XMLHttpRequest(); 
             } 
           xmlhttp.onreadystatechange=function() 
             { 
             if (xmlhttp.readyState==4 && xmlhttp.status==200) 
               { 
               document.getElementById("ajax_chat").innerHTML=xmlhttp.responseText; 
               } 
             } 
           string = document.getElementById("ajax_chat").innerHTML; 
           xmlhttp.open("GET","content/chat/chat_beitraege.php",true); 
           xmlhttp.send(); 
           } 
		setInterval("loadXMLDoc()",1000);
		document.formular.textfeld.focus;