function searching(url, el) {
    var input = document.getElementById(el);
    if (input.value == "") {
        input.className = "txt-search-error";
        return false;
    } else {
        var str = input.value;
        var output = str.replace( new RegExp( '[^a-zA-Z0-9]', "g" ), "-" );
        location.href = url + "/" + escape(output) + ".htm";
    }
    return true;
}