function fw_check() {
    var txtSearch = document.getElementById("ctl00_txtKeyword");
    var strSearch = txtSearch.value;
    if (strSearch.search(/[<>]/) > -1) {
        txtSearch.value = "";
    }
}

/*function key_check() {
    if (window.event.keyCode == 13) {
        document.form1.search_button.click();
    }
}*/