Hi, So glad to meet you here. I need your help. 1. I am developing a web-based system. Since the system is used in intranet, I follow the deployment on sun java website and use <Object> tag and .exe on web server. When user enter the webpage, the exe will run every time. I don't want the setup file run when the plug-in is already installed. Could anyone tell me how? 2.I use java plug-in 1.3.1_02 and applet. When I use zip file for "Achive" attribute, it is Ok. But when I use jar, the plugin could not find the classes in jar. I don't know why. 3. I need one dll to download to the client PC, so that applet could use it. Could the system download the dll automatically? How to do it? Thanks a lot.