Script UI - Keeping Windows Open

Hi all,

Does anyone know how to write javascript-generated Script UI windows that will stay open in Illustrator?

e.g.: Take one of the examples in Adobe Utilities\ExtendScript Toolkit CS4\SDK\Samples\javascript, such as "SnpCreateCheckBoxRadioButtons.jsx" (also attached). If you run this with target application="ExtendScript Toolkit", the generated window will stay on screen until closed (duh...). However, if you try to run it with illustrator, the window will immediately disappear.

It seems like the window is getting force-closed by illustrator when the script has finished executing, but why is the behaviour different between the two targets? And how on earth can you stop it from closing? I've searched high and low, and can't find any replies to this question. Please help me before I tear my hair out...

Thanks!