function QueryString(item) {
    var sValue = location.search.match(new RegExp("[?&]" + item + "=([^&]*)(&?)", "i"))
    return sValue ? sValue[1] : sValue
}

function SearchItem(itemId) {
    var keyword = $("#" + itemId).val();
    var url = "/zoeken";
    window.location.href = url + '?keywords=' + keyword;
}

function keywordTextBox_OnKeyDown(evt) {
    evt = (evt) ? evt : ((window.event) ? event : null);
    if (evt) {
        if (evt.keyCode == 13 || evt.keyCode == 0 || evt.type == 'click') {
            SearchItem('searchKeywords');
            return false;
        }
        if (evt.keyCode == 9) {
            $("#searchButton").focus();
        }
    }
    return true;
}