server error message

all i wanted to do was make a simple if statement on my asp.
if both texts were correct then a msgbox should appear saying "it worked". but when i run it i get an error saying that it is invalid to show a modal dialog when the application is running in userinteractive mode. where do i go to change this? thanks in advance.

since you double posted...why I dont know...I am going to assume from your other post you are trying to do this in asp .net...you cant do that..

asp .net is SERVER SIDE. You cant do stuff like that.