function addFriend( friend_id ) {
    $.post(base_url+'addFriend',{'friend_id':friend_id},function(data){
        $.jGrowl(data.msg);
    },'json');
}
function removeFriend( friend_id ) {
    var friends_array = new Array();
    if( parseInt(friend_id) != friend_id ) {
        var friend_id;        
        $.each( $('.accounts li input:checked'),function( index, item ) {
            friend_id = $(item)[0].id.replace('user_friend_', '');
            friends_array.push(friend_id);
        });
        friend_id = friends_array.join(',');
    } else {
        friends_array.push(friend_id);
    }
    $.post(base_url+'removeFriend',{'friend_id':friend_id},function(data){
        $.jGrowl(data.msg);
        if( data.err == 0 ) {
            $.each( friends_array, function( index, friend_id ) {
                $('#user_friend_'+friend_id).parent().parent().fadeOut(function(){
                    $(this).remove();
                });
            });
        }
    },'json');
}