Jquery_review textarea scroll bar up and down implementation

As we all know, various browsers have different support for HTML, CSS and native JS. But jquery nicely encapsulates the different implementations of various browsers, and is a good solution to cross-browser CSS issues. Here is a demo when review form operation, this if add animation effect will be better, jquery all the animation effect can be realized through animate function, here a CSS property, ScrollTop property, is the distance from the top margin of the current scroll bar, and also uses the-= and + = in the CSS. Record in this place, convenient to do the project later when looking for use.

<%@ page language= "java" import= "java.util.*" pageencoding= "Utf-8"%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >