Untitled

<html>
<head>
    <script type="text/javascript">

    // This function is the problem function - should stop the form submitting on return press.
    function StopReturnKey(e)
    {
        if(GetKeyCode(e) == 13)
        {
            return false;
        }
        else
        {
            return true;
        }
    }

    // A cross-browser keycode checking function.
    function GetKeyCode(e)
    {
        var evt = (e) ? e : (window.event) ? window.event : null;
        if(evt)
        {
            var key = (evt.charCode) ? evt.charCode:
                ((evt.keyCode) ? evt.keyCode : ((evt.which) ? evt.which : 0));
            return key;
        }
    }

    // Creates cross-browser event listeners.
    function AddEvent(el, event, trigger, useCapture)
    {
        var obj = document.getElementById(el);

        if (obj.addEventListener)
        {
            obj.addEventListener(event, trigger, useCapture);
            return true;
        }
        else if (obj.attachEvent)
        {
            var r = obj.attachEvent('on' + event, trigger);
            return r;
        }
        else
        {
            obj['on' + event] = trigger;
        }
    }
    </script>
</head>
<body>
    <form>
        <input type="text" id="tagInput">
    </form>

    <script type="text/javascript">
        // Add the event listener to the textbox...
        AddEvent("tagInput", "keyup", StopReturnKey, true);
    </script>
</body>
</html>