I currently have a powerbuilder application that runs off our corporate intranet via a plugin. This application, though, requires a one-time installation for the plug-in to work. What I would like to do is when the user clicks the hyperlink to run the application, have a way to detect (cookie ?) whether or not it has been installed. If it has, send the user to the page that has the plug-in, otherwise, redirect the user to the installation instructions for the plug-in. Our standard browser is IE 4.01 if that makes any difference. Any ideas???