function chkRegThis() {


    if( $("form#sendForm #user_name").val() == "" ){
        alert("請填寫帳號！");
        $("form#sendForm #user_name").focus();
        return false;
    }  


    if( $("form#sendForm #user_pw").val() == "" ){
        alert("請填寫密碼！");
        $("form#sendForm #user_pw").focus();
        return false;
    }  
    
    //驗證碼
    if( $("form#sendForm #code").val() == "" ){
        alert("請填寫驗證碼！");
        $("form#sendForm #code").focus();
        return false;
    }   

    $("form#sendForm submit").prop('disabled',true);

    $.ajax({
        type: "POST",
        url: "ajax/get_login.php",
        data: $("form#sendForm").serialize(),
        dataType: "json",
        cache: false,
        async: false,
        success: function(data) {

            if(data['status'] == "true"){
                turn = true;
                alert('登入成功');
            }else{
                alert(data['msg']);
                turn = false;
                $("form#sendForm submit").prop('disabled',false);
                reSIImage();
                $('#code').val('');
            }
        }
    });
    return turn;

}