[jQuery] AutoExec

Hi Folks
How can I force my JQuery script run?
After my Html page is loaded I have some scripts in the middle of DOM (like I need) (because is generated from some db_query)
<script>
$(document).ready(function(){
$("markup02").append("something");
$("img").attr({title:"something"});
});
</script>
My JQuery.js is fine
Is it possible?
Regards
Mario