Javascript: Uncaught ReferenceError: XMLhttpRequest is not defined

Question

I moved a file from one server (where it worked) to another and received this error from the console. Is there some library or something that could be missing from the server? It's running IIS 7 on windows server 2008 R2 Standard.

<script> 
        var xmlhttp = new XMLhttpRequest();
    </script>   

Answer 1

It's XMLHttpRequest, note the capital H