CSS Popup box

Recently want to make a similar landing box of the kind of pop-up box, in fact, there are many examples on the internet, and there are corresponding plug-ins, such as: Jquery-ui, can be used directly, and I simply made a simple version of the landing box, really easy.

In fact, the principle is to set two Div, a div_cover, a div_content. Div_cover is used to overwrite the original interface, so that the original interface is not touched and blurred, and div_content is used to display the content, the key point is to z-index this CSS property to set (Z-index property set the stacking order of elements. Elements with higher stacking order are always in front of elements with lower stacking order

CSS Popup box