Issue with IFrame scroller script

[jimp]

1) Script Title: Top-Down scrolling window script

2) Script URL (on DD): http://www.dynamicdrive.com/dynamicindex8/topscroll.htm

3) Describe problem:
I need help... my javascript skills are sadly lacking...
The feed for my IFRame is a sql extract populating the display that scrolls... this works... but the length of this feed is variable and I need to be able to refresh this data at the end of each scroll.

I have a javascript function that is called to refresh the data and I placed it in the Initialization function... but it doesn't appear to adjust the settimeout call to start the refresh function as the document length changes...

The line I added is setTimeout("reLoad()",dataobj.offsetHeight*4);
the *4 is a swag that seems to work as a multiplier of the document length.

the problem is that I need to adjust this length as the document shortens.

any help would be appreciated as I seem to be floundering...

        <script type="text/javascript">

        /***********************************************
        * IFRAME Scroller script- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
        * This notice MUST stay intact for legal use
        * Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
        ***********************************************/

        //Specify speed of scroll. Larger=faster (ie: 5)
        var scrollspeed=cache=2

        //Specify intial delay before scroller starts scrolling (in miliseconds):
        var initialdelay=500

        function initializeScroller(){
            dataobj=document.all? document.all.datacontainer : document.getElementById("datacontainer")
            dataobj.style.top="5px"
            setTimeout("getdataheight()", initialdelay)
            setTimeout("reLoad()",dataobj.offsetHeight*4);
        }

        function getdataheight(){
            thelength=dataobj.offsetHeight
            document.getElementById("lbl_ScrollRefresh").innerHTML = thelength;
            if (thelength==0)
                setTimeout("getdataheight()",10)
            else
                scrollDiv()
        }

        function scrollDiv(){
            dataobj.style.top=parseInt(dataobj.style.top)-scrollspeed+"px"
            if (parseInt(dataobj.style.top)<thelength*(-1))
                dataobj.style.top="5px"
                setTimeout("scrollDiv()",40)
        }

        if (window.addEventListener)
            window.addEventListener("load", initializeScroller, false)
        else if (window.attachEvent)
            window.attachEvent("onload", initializeScroller)
        else
            window.onload=initializeScroller

        </script>

Thanks Jim-