function submitenterLB(myfield,e) {
    var keycode;

    if (window.event) keycode = window.event.keyCode;
    else if (e) keycode = e.which;
    else return true;

    if (keycode == 13) {
        document.getElementById("Main1__ctl0_LnkSubmit").click();
        return false;
    } else return true;
}