This page is equipped with a "Page-Enter" meta tag:

<meta http-equiv="Page-Enter" content="blendtrans(duration=2.0)">

Insert this line in the head section, and your document will have a "Page-Enter" effect

There are 25 different Page-Enters, all of them are defined in the meta tag
The content attribute describes the effect.
This is the only blendtrans Page-Enter, the 24 other is revealtrans Page-Enters
The duration property describes how many seconds before the effect is completed.

Feel free to look at the source code