riporto tutto il codice della pagina va...

codice:
<html>

<head>
<script language="javascript">
<!--
function PopUp(){
msg=open("http://www.asem.it/pop_up.htm", "PopUpWindow", "toolbar=no, directories=no, menubar=no, width=170, height=340, resizable=no");
}
// -->
</script> 

<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>Asem S.p.A.</title>
<meta name="GENERATOR" content="Microsoft FrontPage 6.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
</head>

<frameset framespacing="0" border="0" rows="*,409,*" frameborder="0">
  <frame name="superiore" src="sopra.htm" scrolling="auto" marginwidth="0" marginheight="0" noresize target="_self">
  <frame name="superiore1" src="centro.htm" marginwidth="0" marginheight="0" scrolling="no" noresize target="_self">
  <frame name="inferiore" src="sotto.htm" scrolling="auto" marginwidth="0" marginheight="0" noresize target="_self">
  <noframes>
  <body onLoad="java script:PopUp();">

  

La pagina corrente utilizza i frame. Questa caratteristica non è
  supportata dal browser in uso.</p>

  </body>
  </noframes>
</frameset>

</html>