I've tried the following code in IE on XP SP2 and it appears there is a memory leak. It could potentially lead to a dos. Interestingly I tried the same code with a very large status message and the leak seemed to slow down. Strange. <HTML> <Body> <script language="JavaScript"> setInterval("x()",5); function x(){window.status= "My website is important... boomkark me!"} </script> This sample eats about 4K of memory per second. </Body> </HTML>