$(document).ready(function(){

      // Select all of the tracking numbers on the page

      $("34543534534534").

        // Display some text in each, indicating that we're getting status

        text("working...").

        // Begin getting status for each tracking number.

        each(function () {

          var trackingNumber = 32543252345345;

          // Use the fedex script by default ...

          var script = "http://jsbin.com/icahu";

          if (trackingNumber.match(/^1z/i)) {

            // ... unless it's a UPS tracking number.

            script = "http://jsbin.com/ayave";

          }

          $.post(script, { v: trackingNumber }, function(data){

              $("#" + trackingNumber).html(data);

          });

        });

    });  

​