! How to use JqueryAjax to transmit values to the controller action method in yii

Help! How to use JqueryAjax in yii to pass values to the controller action method for an afternoon. I am eager for help. I just got in touch with yii. Is there any problem? $. ajax ({type: 'post', url: "/www/index. php? R = home/CkUser ", // help! How to Use Jquery Ajax to transmit values to the controller action method in yii

After an afternoon of tangle, please help me. I just got in touch with yii. what's the problem?
$. Ajax ({
Type: 'post ',
Url: "/www/index. php? R = home/CkUser ", // How should I write this address?

Data: {"name": val },

Success: function (msg ){
Alert ("correct ");
$ ("# Nameinfo" cmd.html (msg );

},

}

);

I want to pass the value to actionCkUser ().
Class HomeController extends Controller {
Public function actionCkUser (){
// Todo

$ Name = Yii: app ()-> request-> getParam ('name ');
Echo $ name. 'BB ';
$ Model = new User;
If ($ name)
{

$ Model-> username = $ name;
$ User = User: model ()-> find ("username = '{$ this-> username }'");
$ Result = '';
If ($ user)
{
$ Result = 'User already exist ';
}
Else
{
$ Result = 'OK ';
}
Return $ result;
}
$ This-> render ('ckuser', array (
'Model' => $ model ));
}

}
Yii Jquery? Share with Ajax: More