Your question isn't very easy to understand. What exactly do you mean by "make a window stay on top but not on the bottom"?
Hello. Sorry about that. I need a website to remain in the bottom window always. Once a button is clicked a pop up window is opened and I do not want the pop up window to go behind the parent window. I do not control the content in the pop up window so I cannot add script to it to make it stay on top.