Hey friends i am using javascript sdk to post on users friends wall with jQuery facebook multi friend selector however i am getting this error friendId.split is not a function. Here is my code

```
function recommendToFriend(pic, url, friendId, fromName)
{
    alert(friendId);
    var friendList ;
    pFriend = new Array();
    pFriend = friendId.split(',');
    for( x in pFriend )
    {
        alert(pFriend[x]);
        var publish = {
            method:'feed',
            picture:pic,
            link:url,
            name:'SHARP Product Recommend',
            caption: fromName + 'has recommend a product to you via Sharp Expert lounge',
        };

        FB.api('/'+pFriend[x]+'/feed', 'post', publish, function(resp) {
            if( !response || response.error )
                alert('Unable to share');
            else
                alert('Successfully posted to firends wall');
        });
    }
}

```

In alert box i got comma seperated friend ids so i use split function post on each users wall seperately i dont know whats wrong here please help me