[HTML] PostBack 後 ScrollarBar 維持原位置

[HTML] 

//支援所有瀏覽器
<script type = "text/javascript">

 window.onload = function () {

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

        if (!isNaN(scrollY)) {

            window.scrollTo(0, scrollY);

        }

    };

    window.onscroll = function () {

        var scrollY = document.body.scrollTop;

        if (scrollY == 0) {

            if (window.pageYOffset) {

                scrollY = window.pageYOffset;

            }

            else {

                scrollY = (document.body.parentElement) ? document.body.parentElement.scrollTop : 0;

            }

        }

        if (scrollY > 0) {

            var input = document.getElementById("scrollY");

            if (input == null) {

                input = document.createElement("input");

                input.setAttribute("type", "hidden");

                input.setAttribute("id", "scrollY");

                input.setAttribute("name", "scrollY");

                document.forms[0].appendChild(input);

            }

            input.value = scrollY;

        }

    };

</script>


//chrome和firefox不支援
<%@ Page Language="C#"  MaintainScrollPositionOnPostback="true" %>

參考連結
http://www.dotblogs.com.tw/atowngit/archive/2011/03/03/21643.aspx
http://www.aspsnippets.com/Articles/ASPNet-MaintainScrollPositionOnPostback-not-working-in-Firefox-and-Chrome.aspx