Html+css the implementation of the source Code login pop-up box mask layer effect __html

In the Web development, many sites have done some particularly beautiful effect, such as user login frame mask layer effect, this article to introduce how CSS to achieve the login pop-up mask layer effect, the need for friends can refer to the source code of this article.
HTML+CSS implementation of the login pop-up mask layer effect, the source code is as follows:

<! DOCTYPE html>
Run online

 

The main use of CSS position relative positioning and absolute positioning as well as z-index properties.

 

 
Original address: http://www.manongjc.com/article/1280.html
 
Css:enabled and: Disabled pseudo class selector use method and instance CSS pseudo class selector: checked instance explain Css:before selector usage and example how CSS places background pictures in a certain place Css:empty pseudo class Selector