infinitelo - you need to provide more information on your environment. Is this in an HTA, the WSH, client/server ASP, or what. There are other threads here that discuss clipboard manipulation - do a keyword search.
Karpov - per your post, you are using the Browser's OM to perform your copy/paste. So whether you are using JS or VBS is absolutely irrelevant - provide the browser supports it. Jon Hawkins