asp.net WebForm_AutoFocus function changes my document scroll position

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C#

ASP.NET

Javascript

jQuery

I am building a web Application using ASP.NET with Ajax functionality.
In my Application, I don't want the document scroll position to be changed after a patial postback. I have set maintainScrollPositionOnPostBack in Web.Config to "true". But, somehow it's not working.

<pages maintainScrollPositionOnPostBack="true" >
      <controls>
        <add tagPrefix="ig" src="~/Controls/SOAGrid.ascx" tagName="ExcelGrid"/>
        <add tagPrefix="ig" src="~/Controls/IgMenu.ascx" tagName="IgMenu"/>
        <add tagPrefix="ig" src="~/Controls/IgList.ascx" tagName="IgList"/>
      </controls>
    </pages>

Then, I tried Javascript/Jquery to store the scrollTop position, and set it back after the postback is finished.

var bodyScrollTop = 0;

function BeginRequestHandler(sender, args) {
    bodyScrollTop = $(document).scrollTop();
}

function pageLoad() {
   $(document).scrollTop(bodyScrollTop);
}

But, this is also not working. I found out there are some javascript methods namely scriptResource.axd which run after all my scripts. In this script, there is a code WebForm_AutoFocus which resets my document scroll position. Please suggest me a solution for this.