Maintain scroll position on postback in modal popup

A. Add 2 functions to store and set scroll position

1. storeScrollPositionEd(scrollValue) = save scroll position while scrolling

2. setScrollPositionEd() = set top position of div

<script type="text/javascript">

    function storeScrollPositionEd(scrollValue) {

        $('#<%=hfEdScrollPosition.ClientID%>').val(scrollValue);

    }

    function setScrollPositionEd() {

         $("#divEdScroll").scrollTop($('#<%=hfEdScrollPosition.ClientID%>').val());

    }

</script>    

B. Find the modal-body DIV name an Id and add onscroll function

<div id="divEdScroll" class="modal-body" onscroll="storeScrollPositionEd(this.scrollTop);">

C. Add a HiddenField to store scroll value

<asp:HiddenField ID="hfEdScrollPosition" runat="server" Value="0" />

D. call setScrollPositionEd() function after a postback