jquery validate remote error

I am using jquery.validate plugin for checking username availability

if user type sample i need to display error as

sample is available or sample is not availabl开发者_StackOverflow社区e

$("#form_id").validate({
rules: {
username: {
required: true
}
},
messages:{
username: {
required: "username should not be blank",
remote: $('#username_id').val()+"is already available"
}
}
});

Remote error displays

is not available

i expect

sample is not available

---

Updated: I had tried this

remote: jQuery.format("{0} is already available")

Once i click submit button error is displayed as sample is not available if i click submit again and again error becomes

server_pg.php is not available

i dont know why jquery.validate misbehaving like this...

---

I don't see any remote rule in your definition. Try:

$("#form_id").validate({
    rules: {
        username: {
            required: true,
            remote: 'test.cgi'
        }
    },
    messages:{
        username: {
            required: 'username should not be blank',
            remote: $.format('{0} is already available')
        }
    }
});

Also make sure that your server side script returns JSON content type with true or false value. Finally make sure that the username input has id="username_id" as specified in the messages.

---

If you just remove this from messages:

remote: $('#username_id').val()+"is already available"

Then anything but true will be displayed as the message, so just have your server return exactly:

"nameChecked is already avaialable"

Return only this (or whatever message), quotes included and that string gets displayed. This also ensures you're getting what was checked, not the current value.