Maintain Scroll Position of DIV on PostBack in ASP.Net

<div id="dvScroll" style="overflow-y: scroll; height: 260px; width: 300px">

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</div>

<hr />

<input type="hidden" id="div_position" name="div_position" />

<asp:Button Text="Submit" runat="server" />

 

<script type="text/javascript">

window.onload = function () {

    var div = document.getElementById("dvScroll");

    var div_position = document.getElementById("div_position");

    var position = parseInt('<%=Request.Form["div_position"] %>');

    if (isNaN(position)) {

        position = 0;

    }

    div.scrollTop = position;

    div.onscroll = function () {

        div_position.value = div.scrollTop;

    };

};

</script>