& AJAX - request in externer .js - Was ist es bloss???

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function fireRequest(){
    var ajax = new XMLHttpRequest();
    ajax.onreadystatechange = function () {
        if (this.readyState == 4) {
            document.form1.ich.value = this.responseText;
        }
    }
    ajax.send(null);
}

Ups. Das ist falsch, zu wenig c&p ;p  
  
 ~~~javascript
  
 function fireRequest(){  
     var ajax = new XMLHttpRequest();  
     ajax.open('GET','test.txt',true);  
     ajax.onreadystatechange = function () {  
         if (this.readyState == 4) {  
             document.form1.ich.value = this.responseText;  
         }  
     }  
     ajax.send(null);  
 }  

So muss es natürlich da stehen.

MfG
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