JS implementation of the first display of large graphics automatically after the display small map of the advertising code _javascript skills

The example of this article describes the JS implementation of the first display of large graphics automatically after the display small map of the advertising code. Share to everyone for your reference. Specifically as follows:

This is a very good javascript image effect, when the initial opening of the Web page, the display is a large picture, like a screen ads, stay for a while, automatically slowly back up, when the change from JS control advertising pictures, always displayed at the top of the page, in some large portal site we often see this effect, Personal feeling is very cool Oh!

Let's take a look at the running effect screenshot:

The online demo address is as follows:

http://demo.jb51.net/js/2015/js-big-to-small-pic-adv-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 ">  

The

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