Help with Javascript to replace enter key code with the tab key code that works in both IE 7, 8 & Firefox

I have tried several solutions but none seems to correctly work in all browsers.  This code works fine in IE but it fails to tab to the next form element in line instead it forces the page to submit.

    <script language="javascript" type="text/javascript">
        function enterToTab(evt) {
            var pressedKey;
            if (!evt) var evt = window.event; {
                pressedKey = evt.which || evt.keyCode;
            }
            alert("Pressed Key: " + formRef);
            for (var i = 0, e = formRef.elements, len = e.length, hasNext = true; i < len && hasNext; i++)
                if (e[i].type && /^text|password|file/.test(e[i].type)) {
                for (var j = i + 1; j < len && (!e[j].type || /submit|reset/.test(e[j].type) || (focusAny ? /hidden/.test(e[j].type) : !/^text|password|file/.test(e[j].type))); j++);
                hasNext = j != len;
                e[i].onkeypress = (function(index, notLast) {
                    return function() {
                        var ta = false, k = (arguments[0] ? arguments[0].which : pressedKey) != 13;
                        if (!k && !(ta = (this.type == 'textarea' && this.value.length > 0)) && notLast)
                            this.form.elements[index].focus();
                        return k || ta;
                    }
                })(j, hasNext);
            }
        }    
    </script>
...
<body onload="ResizeContentAreaOverall();" onresize="ResizeContentAreaOverall();" onkeydown="enterToTab(event);">

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mmahon512Asked:
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Gurvinder Pal SinghCommented:
@mmahon512: It would be much easier to debug, if you could tell at which exact line of javascript the error occurs.
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mmahon512Author Commented:
The link provided answered the question and helped me solve the problem.  I had to tweak it a little to fit but it gave me a great starting point.
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leakim971PluritechnicianCommented:
Thanks for the points!
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