jquery ajax completion event

can someone show me how to make a jquery ajax completion event.

$("#submit_js").click(function() {
    $.post(
      "user_submit.php", 
      {comment: $("#comment").val(), aid: imgnum}, 
      function(data){
        /*alert(data);*/
      });
});

when this POST request co开发者_运维技巧mpletes successfully, I want to show the message in a specific div instead of its earlier contents:

Your comment : $('#comment').val() was submitted successfully.

//I want to display the comment.

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Put this inside your "on complete" callback function:

$( 'selector for your DIV' ).html ( 'your message' );