Esto debería funcionarte
Código HTML:
Ver original<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <script type="text/javascript"> //<![CDATA[
var win= null;
function VentanaCentrada(pagina,w,h,nombre){
var winleft = (screen.width-w)/2;
var wintop = (screen.height-h)/2;
caracteristicas='height='+h+',width='+w+',top='+wintop+',left='+winleft+',scrollbars=no,toolbar=no,resizable=yes'
win=window.open(pagina,nombre,caracteristicas)
if(parseInt(navigator.appVersion) >= 4){win.window.focus();}
}
//]]>
<a href="v1.html" onclick="VentanaCentrada(this.href,'400','400','Popupuno');return false;" > Abrir Popup 1
</a><br /> <a href="v2.html" onclick="VentanaCentrada(this.href,'400','400','Popupuno');return false;" > Abrir Popup 2
</a><br /> <a href="v3.html" onclick="VentanaCentrada(this.href,'400','400','Popupuno');return false;" > Abrir Popup 3
</a><br />
Lo del centrado es opcional
Saludos