Insert Ajax table

Popup opener script is in the table file.
On this main page the click alert is working.
On this main page the popup alert and the popup page are not working.
Table file directly viewing: everything is working (without css).
Used table file: ajax_table-A.htm.
Used popup file: ajax_popup.htm.

in the table file:

<p><a href="#" onclick="alert('you clicked!'); return false">click-alert?</a></p>
...
<td><input id="val" value="giveValue!"></input></td>
...
<p><a href="#" onclick="pop(); return false">popMeUp!</a></p>
...
<script type="text/javascript">
function pop(){
   var val=document.getElementById('val').value;
   alert('PopUp is coming!');
   window.open('ajax_popup.htm' + "?val=" + val, "_blank", "directories=no, status=no, menubar=no, scrollbars=yes, resizable=no,width=600, height=280,top=200,left=200");
}
</script>

Next: ajax_testing-B.htm