[jQuery] How to make .get return only div contents

[SECSteve]

I have been able to get the .get method to work and put the results in
a <div>.  My problem is that my .get calls ont he same page as it
originates from so it returns the entire page inot the <div>.  I get
the entire page with my new content inside the existing page.    How
do I get just the new content for my <div>?

Here is me code.

  function updateCompanies(alpha){
    $.get("InteractionsByCompanyr6.aspx?alpha=" + alpha
      ,""
      , function(data){
          $("div#update1").html(data);
        }
    );
  }


Thanks,
Steve