function keydosearch(event) {
    if (event.keyCode == 13) dosearch();
}

function dosearch() {
    var q = $("#q");
    if (q && q.attr("value") != "") {
        window.open(searchpageurl + "?q=" + encodeURIComponent(q.attr("value")), "_self");
        q.attr("value", "");
    }
}