function DetectNEnter(e, btn) {
    var characterCode;
    if (e && e.which) {
        // NN4 specific code
        e = e;
        characterCode = e.which;
    }
    else {
        // IE specific code
        e = event
        characterCode = e.keyCode;
    }

    if (characterCode == 13) //// Enter key is 13
    {
        e.returnValue = false;
        e.cancelBubble = true;
        document.getElementById(btn).click();
    }
}