function Search(e, textboxid) {

    var evt = e ? e : window.event;
    var tb = document.getElementById(textboxid);
    var v = document.getElementById(textboxid).value;

    if (tb) {

        if (evt.keyCode == 13) {
            document.location="Search.aspx?Q=" + v
            return false;
        }
    }
}