The WEB Pages is scrolling Automatically without User needs

Oh my God I have stuck in an unknown problem and I have posted so many question in different forums but still failed to solve that

Problem is the web pages is scroll UP if I scroll it down and it scroll down when I scroll it UP

the scroller (scroll bar) stucks middle of the page niether it comes down nor UP

I have posted this question in detail and provide full markup Please solve this

http://forums.asp.net/t/1962569.aspx?ASP+NET+PAGE+SCROLLING+automatically+

http://forums.asp.net/t/1952596.aspx?The+aspx+page+is+automatic+scrolling+upward

I have One Master Page while other is content pages

a script Manger in master page with UpdatePannel

while other content pages has also update pannels