<?php
header('Content-Type: text/html; charset= utf-8');
error_reporting ('Е_АLL');
?>

<input type="submit" value="загрузить штамп" onclick="on_content()" />



<div id="temp" style="width: 100px; height: 100px; border: silver solid 1px;"></div>

<script type="text/javascript">
  

  function on_content (){
    $('#temp').append('123');
  }
  
</script>