although the X will close the window, if you put in the body tag 'onunload=' or 'onbeforeunload=', your effect will be...
onunload= will call a function first, then close the window...
onbeforeunload= (only in ie, i believe) will call a function, let's say a confirm prompt, thereby alerting the user to make certain they really want to close the browser window...if they confirm the close, the window closes, but if they click no, the window remains...
- spewn