function checkCode() {
    var CheckCode = jQuery("#txtCode").val();
    var msgCtrl = jQuery("#errcc");
    msgCtrl.html('验证中...');
    if (CheckCode == "") {
        msgCtrl.html('请填写验证码！');
        return;
    }
    var flag = false;
    jQuery.ajax({
        type: 'POST',
        url: 'tools/Check.aspx',
        data: 'action=checkform&type=codeValid&values=' + escape(CheckCode),
        async: false,
        dataType:"json",
        success: function (json) {
            if (json)
            {
                if (json.status == "y") {
                    flag = true;
                    msgCtrl.html("");
                }
                else {
                    msgCtrl.html('<font color=red>' + json.info + '</font>');
                    flag = false;
                }
            }
        },
        error: function () {
            msgCtrl.html('<font color=red>Error!</font>');
            flag = false;
        }
    })
    return flag;
}