JavaScript Error with Mozilla

Hello,

 var strURL = 'http://www.google.com/calculator?q=1USD=?EUR'

            var request = new XMLHttpRequest();
            request.open("GET", strURL, false);
            request.send(null);
            if (request.responseText != "") {
                document.getElementById('dv').innerHTML = request.responseText
            }

I have JS Code that working fine in IE but display error in Mozilla as mentioned below


Error: uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE)" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: http://localhost:49637/currencyconverter.aspx :: convert :: line 26" data: no]

What type of error is this ?
Please provide me any Solution..

Ajay
ajaypatelfromsanthal.blogspot.in