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   .
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function sendLogin()
{
        // If the 'data' variable is not defined then there was probably some
        // problem with loading the page. The best guess is that the user's network
        // connection has gone down. Inform the user and try to reload the page.
        if (typeof(data) == "undefined") {
                alert ("The network connection seems to be down. Press 'Ok' to try again.");
                location.reload(true);
                return;
        }

        var a = new Array;

        // Compute the login hash.
        var shex = byteArrayToHexString(convertFromBase64(data),0,4);
        var goodp = document.myform.Password.value.substr(0,16);
        document.myform.Password.value = "";            // Make sure password never gets sent as clear text
        for (var i = goodp.length; i < 16; i++) {
                goodp = goodp.concat(String.fromCharCode(1));
        }
        var str = shex + goodp;
        // Pad the string to 64 bytes.
        for (var i = str.length; i < 63; i++) {
                str = str.concat(String.fromCharCode(1));
        }
        str = str.concat((document.myform.username.value == 'user') ? 'U' : String.fromCharCode(1));
        var hash = hex_md5(str);
        var saltHash = shex.concat(hash);
        a = convertHexString(saltHash, 20, 20);

        // Send the new configuration to the server
        sendDataToServer ("post_login.cgi?data=" + convertToBase64(a),loginReturnValue)
}