var ajax = {
    username: 'user',
    password: 'pass',
    getInfo: function(){
                $.ajax({
                    url: 'post.php',
                    data: 'username=' + this.username + '&password=' + this.password,
                    type: 'post',
                    success: function(data){
                                if(data){
                                    console.log('true');
                                }
                                else{
                                    console.log('false');
                                }
                             }
                });
             }
}

ajax.getInfo();