How do i make page go dark and unusable until user has exited textbox?
On various video sites you can click cinema mode and the page goes dark, whilst you watch the video.
On my page I have a box which appears, where the user enters their name and email address. But I would like the box to remain active and in view. While the rest of the page goes darker and unusable, Like on the video player websites
How do I do this?