Maintain div scroll position on postback with html/javascript

Question

Maintain div scroll position on postback with html/javascript

6.1k views Asked by ostrgard At 08 February 2011 at 21:00

Is there a way to maintain the div scroll position on a postback, without using asp? So far I've only found solutions using asp.

Original Q&A

There are 2 answers

**Doug Chamberlain** · Answer 1 · 2011-02-08T21:12:07+00:00

http://blogs.x2line.com/al/articles/156.aspx

<!doctype html>
<html>
<head>
<title></title>

<script language="javascript">
    // function saves scroll position
    function fScroll(val)
    {
        var hidScroll = document.getElementById('hidScroll');
        hidScroll.value = val.scrollTop;
    }

    // function moves scroll position to saved value
    function fScrollMove(what)
    {
        var hidScroll = document.getElementById('hidScroll');
        document.getElementById(what).scrollTop = hidScroll.value;
    }
</script>
</head>

<body onload="fScrollMove('div_scroll');" onunload="document.forms(0).submit()";>

<form>

<input type="text" id="hidScroll" name="a"><br>
<div id="div_scroll" onscroll="fScroll(this);" style="overflow:auto;height:100px;width:100px;">

   .. VERY LONG TEXT GOES HERE

</div>
</form>
</body>
</html>

**Luis Medel** · Answer 2 · 2011-12-23T12:16:43+00:00

Maybe this javascript code works for you

        function loadScroll ()
        {
            var m = /[&?]qs\=(\d+)/.exec (document.location);
            if (m != null)
                myDiv.scrollTop = parseInt (m[1]);
        }

        function saveScroll ()
        {
            var form = document.getElementById ("myForm");
            var sep = (form.action.indexOf ("?") == -1) ? "?" : "&";
            form.action += sep + "qs=" + myDiv.scrollTop;
        }

Now, you can watch for the "submit" event to save the position in the "action" attribute:

        document.getElementById ("myForm").addEventListener ("submit", saveScroll, false);

And in your BODY tag...

<body onload="loadScroll ();">
    ....
</body>

I can't test the code right now, but I think you get the idea.

TechQA.

Maintain div scroll position on postback with html/javascript

There are 2 answers

Related Questions in JAVASCRIPT

Related Questions in HTML

Related Questions in POSTBACK

Related Questions in MAINTAINSCROLLPOSITIONON

Popular Questions

Popular Tags

Trending Questions