text scroll vertically in textbox

see this

http://javascript.internet.com/text-effects/layer-scroller.html

=============

http://www.java2s.com/Code/JavaScript/GUI-Components/Scrolltextwithcustomscollbar.htm
============
onbuttonclick:
http://www.java2s.com/Code/JavaScript/GUI-Components/TextScrollwhenclicking.htm
====================
onmouseover:
http://www.java2s.com/Code/JavaScript/GUI-Components/TextScrollwhenmouseover.htm
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onmouseover:
http://cssglobe.com/post/1495/easy-scroll-accessible-content-scroller