jQuery .load() not working

your code should be something like this

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js">

js code

 <script type="text/javascript">
   jQuery(document).ready(function(){
       jQuery("#contain").load("http://examplepage.com/forum/showthread.php?tid=NN #pid_NN");
   });
</script>