Ajax加载问题

I need to load a div using that's id, which is not happening, can anybody have a solution to my issue please? :

$.ajax({ 
        type: "POST",
        url: "<?php echo CONTENT_PATH?>experts/experts.php",
        data: "#health", // Problem is over here


        success: function(msg){                                         
                                    if(parseInt(msg)!=0)
                                    {                                       
                                        $('#cnt_middle').html(msg);
                                        $('#loading').css('display','none');
                                        //$('.content_bottom').hide();
                                    }
                                },
                                error:  function(){
                                    $.Zebra_Dialog('<?php echo LOAD_ERROR; ?>');
                                    document.clear();
                                    $('#loading').css('display','none');
                                }                           

                            });

thanks.

The $.ajax() functions 'data' property should be in some GET/POST conform data format.

Some examples:

data: ({pageid: 10}),
...
data: ({pagename: 'some-page-name'}),
...
data: $('#myform input').serialize(),
...
data: 'pageid=10&num=5',
... etc