JS to achieve horizontal extension of the two-level navigation menu code _JAVASCRIPT skills

This article illustrates the horizontal extension of JS Two-level navigation menu code. Share to everyone for your reference. Specifically as follows:

This is a JS implementation of the horizontal extension open two level navigation menu, mouse on the first level of the Fourth menu item, you can expand the level Two menu, the menu is not too much landscaping, just general modification, the use of friends can be based on your own web site style to beautify the menu style.

The screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/js/2015/js-r-show-menu-style-codes/

The specific code is as follows:

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">