Thank you for reading this. I am posting this here after recommendation from a ranch hand in the JSP forum. I have a jsp site that works fine on IE 5.0 on Windows 2000. Since this is an intranet site, this works perfectly. However, we are in the process of upgrading some PC's to Windows XP which runs IE 6.0. My jsp site no longer works under IE 6 on XP. Does anyone know why Microsoft would put out a new browser that won't support code that worked under 5.0? My exact situation is that I have a site that uses multiple frames. Inside one of the frames is a <select> box. OnChange of this select box some hidden values are set, the frame with the <select> box is submitted, and one other frame is submitted. Changing the selected value in the <select> box will change the information that is displayed in the second frame that is submitted. This works perfectly in IE 5. Under IE 6 on XP, however, when the selected value is changed in the <select> box, the data in the second frame will sometimes change to the data that it should display, and then refresh and revert to display the data that was there before the value was changed. Again, this is a sporadic problem: it seems to happen every 2 or 3 times that you try it. Other times it works exactly as expected. Since it is not happening every time, I am even more confused. I have checked the browser settings between the two browsers and they are in sync. I tried changing a few of the settings in IE 6 that are not available in IE 5 but that didn't make a difference, either. I installed IE 6 on Windows 2000 Server and received the same results, so I am guessing that this is an IE 6 issue and not an XP issue. I can post some code if this will help. Can anyone tell me why this won't work? I have looked all over microsoft's site to find release notes for IE 6 or a list of features that were removed, but I haven't had much luck. If anyone can give me any explanations for this, I'd really appreciate it. FYI, I have to code my site so that it will work on IE 5 on Windows 2000 and on IE 6 on XP. Thanks again in advance.