I have an ASP page that uses javascript to open up another window when that first page is closed or user goes to another link. The javascript runs when the onunload event is triggered. It seems to run fine especially for our local U.S. users. But users in the UK are not getting the onunload event triggered. They use a proxy server but we list our URL as an exception. And their cache is set to check for a new page everytime. They are not receiving any signs of a javascript error. Script debugging is not disabled in Internet Options. We are all using the latest version of Internet Explorer. What else can I check?