Indexof()

JavaScript
1

The first code box produces the result I expected (4).

The second code box produces a -1 on what I believe is the same string (ie var txt=document.innerHTML=xmlhttp.responseText; displays “Bob , Brittany , Brian” when it’s not commented out). Any ideas why? Is it possible “xmlhttp.responseText” isn’t a string?

<html>
<body>

<script type="text/javascript">
var str="Bob , Brittany , Brian";
document.write(str.indexOf(",") + "<br />");
</script>

</body>
</html>



if (xmlhttp.readyState==4 && xmlhttp.status==200) {
	  var div = document.createElement('div');
      div.setAttribute('id', 'link_container');
      div.setAttribute("style","background-color:white;");
      div.style.width = '300px';
      div.style.height = '100px';
      div.style.margin = '-15px 0px 0px 75px';
      //var txt=document.innerHTML=xmlhttp.responseText;
       var txt = str.indexOf("Brittany");
      document.getElementsByTagName('body')[0].appendChild(div);
      document.getElementById('link_container').innerHTML=txt;
   }
2

dooh!

//var txt=document.innerHTML=xmlhttp.responseText;
      var txt=xmlhttp.responseText;
      var txt = txt.indexOf(",");