HTML-Code: 
<script language="JavaScript">
function fenster(){
bild=window.open("acp/smilie.php", "bild", "width=280,height=500,scrollbars=no,resizable=no");
bild.focus();
}
</script>
HTML-Code: 
<a href="javascript:fenster()" alt="dolles Popup">PopUp</a>
So hab ich das immer gemacht.