How to make my JQuery code recognise a parameter in the URL and then choose a line of code

Question

In the code below, I want to change the line of code that reads as:

$("#commentload"+ID).prepend(html);

So that if the parameter order=1 is found in the URL, for example, http://my.com?order=1then it should execute.

$("#commentload"+ID).append(html);

Instead of

$("#commentload"+ID).prepend(html);

Hope you understand what I mean.

$(document).ready(function(){
   // Update Status
   $(".update_button").click(function(){
      var updateval = $("#update").val();
      var dataString = 'update='+ updateval;
      if(updateval==''){
         alert("Please Enter Some Text");
      } else {
         $("#flash").show();
         $("#flash").fadeIn(400).html('Loading Update...');
         $.ajax({
            type: "POST",
            url: "message_ajax.php?CID=" + CID + "&Id="+Id,
            data: dataString,
            cache: false,
            success: function(html){
               $("#flash").fadeOut('slow');
               $("#commentload"+ID).prepend(html);
               $("#update").val('');
               $("#update").focus();
               $("#stexpand").oembed(updateval);
            }
         });
      }
      return false;
   });
   //commment Submit
});

Answer 1

You can get the current URL using location.href (or location.search, since you're only interested in the query portion). Search it for your parameter, for instance using a regex:

if ( /order=1/.test(location.href) )
    $("#commentload"+ID).append(html);
else
    $("#commentload"+ID).prepend(html);

If you need a more general solution, see this related question (or this one, as suggested by @naveen).