使jQuery等待

I have the following code in my Ajax, which executes a page reload function when time runs out.

if(time<=0)
{
    $(".time_remaining").html("Reloading the page now.");
    refresh();
}

refresh() is as follows:

function refresh() {
  $.ajax({
    type: 'POST',
    url: 'index.php',
    data: 'refresh=true',
    timeout: 0,
    success: function(data) {
        $("#current_body").html(data);
    },
    error: function (XMLHttpRequest, textStatus, errorThrown) {
      $("#notice_div").html('Error contacting server. Retrying in 60 seconds.');
      window.setTimeout(update, 60000);
    }
});
};

Sometimes the code doesn't update, rather it refreshes, but with the same content as before (the content definitely changes every time). I think it might be due to index.php not working quickly enough, but the Ajax is rushing to execute the

 $("#current_body").html(data); 

line. Can I make it so the Ajax delays itself between sending the data and printing the result?

The success callback will fire only after the server returned a valid response.

 $("#current_body").html(data); // this will be executed when
                                // the "slow" server finishes it's work

So no, it has nothing to do with the server speed.

The success function will wait until the ajax request has finished loading. The problem you are getting may be with the cache. In your options set cache: false and it should be ok :)

/** edited to make more sense **/

Try updating your index.php to "index.php?t="+(new Date()).getTime() to see if that busts any caching that might be causing it to return the same content.