Pop up window with Flash and Javascript

Hi, take a look at the following site:

http://www.donvanderzaan.nl/

In this site, a pop up window is opened when u click any one of the links. The default pop up blocker in Opera does not block these popups. Inorder to make such a popup i followed this tutorial here (http://www.kirupa.com/developer/flash8/centered_popup_window.htm) But Opera’s popup blocker blocked this for me by defualt. But what is special about the pop-ups of the site I mentioned first which doesin’t get blocked? How do I design such popups? Any resourses…?

Thanx.

Not sure why this is flash related but he is using a large image with image hotspots (an image map):

<area shape="poly" coords="365,350...332" href="#" onClick="MM_openBrWindow('cds_dvds_overige.htm','','scrollbars=yes,resizable=yes,width=1024,height=530')">

Perhaps Opera can’t detect popups loaded from an image hotspot?