You can have the ad pop up only if a specific cookie is not set, and once they go on the first page after the ad pops up create the cookie, so as long as the cookie is still there they won't see the ad. Or you can log their IP address in a DataBase and only show it once per IP, but that isn't as nice IMHO....
I wonder how to make popup ad. on opening site only , not all pages and appear one time on opening only
You can have the ad pop up only if a specific cookie is not set, and once they go on the first page after the ad pops up create the cookie, so as long as the cookie is still there they won't see the ad. Or you can log their IP address in a DataBase and only show it once per IP, but that isn't as nice IMHO....
Agreed. That is probably the most annoying thing ever. That and preventing the use of the back button.