Mootools return from Ajax class

programming web dev
1

Not sure if there are many Moo geeks/jQueers here, but im one. Not getting an answer so fast on the mootools forums so i figured id post here.

Ok, so im making a little validation function for checking if a username has already be taken:


       var userNameCheck;
    function checkUsername(username){
        function handleResponse(responseText){
            var response = Json.evaluate(responseText);
            if(response.result == "exists"){
                failInput(userNameCheck, {'string':'This username is in use.'})
                return true;
            }else if(response.result == "avaliable"){
                return false;
            }
        }
        userNameCheck = username;
        query = "username="+username.getProperty('value');
        new Ajax("php/checkUsername.php" , {
          method: 'post',
          data: query,
          evalResponse:false,
          onSuccess: return handleResponse,
          onFailure: handleResponse
        }).request();
    }

the part where it says “onSuccess: return handleResponse,”, can i do that?
is there a smarter way to accomplish what i’m trying?