(NS_ERROR_DOCUMENT_NOT_CACHED) through firefox same code works for safari

I am getting (NS_ERROR_DOCUMENT_NOT_CACHED) error when I try to access the Javascript code through firefox.I get this error in the contents tab of HTTPFOX.

The code is as follow:

<html><head></head>

<body>
<button type="button" onClick="handleButtonClick();">undo</button>
<button type="button">redo</button>
<select><option value="V1">V1</option>
<option value="V2">V2</option>
<option value="V3">V3</option>
<option value="V4">V4</option>
<option value="V5">V5</option></select>  

<script type="text/javascript">
function handleButtonClick(){var xmlHttp, handleRequestStateChange; 
handleRequestStateChange = function() {if (xmlHttp.readyState==4 && xmlHttp.status==200)    {    var substring=xmlHttp.responseText; alert(substring); } }      

xmlHttp = new XMLHttpRequest();
xmlHttp.open("GET", "http://csce.unl.edu:8080/test/index.jsp?id=c6c684d9cc99476a7e7e853d77540ceb", true);   
xmlHttp.onreadystatechange = handleRequestStateChange; xmlHttp.send(null);}
</script>

</body>

I googled and set the parameters of browser in config file as specified in this site but it still doesn't work.

http://code.google.com/p/httpfox/issues/detail?id=20

Can somebody suggest whats going wrong since the same code works fine for safari browser..

ansaurus

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(NS_ERROR_DOCUMENT_NOT_CACHED) through firefox same code works for safari

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