Vertical Scroller - Dev Articles

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June 4th, 2003, 03:24 AM

tim

Contributing User

Join Date: Jun 2002

Posts: 62

Time spent in forums: 12 m 9 sec
Reputation Power: 6

Vertical Scroller

I have the following iframe-based Vertical Scroller code taken from Dynamic Drive, and modified it a little so it's various variable can be controlled by PHP. The problem is, why does it work sometimes and at other times, it jerks up and down when i refresh the page.

Am using IE6. However, when i tried in iE5, it worked consistently.

<?
// this file, external.php is sourced in from iframe's(caller) src property

$nNoticeID = trim($NoticeID);
$nScrollSpeed = 3;
$nInitialFromTop = 10;
$nRate = 50;

?>

<html>
<body>

<div id="datacontainer<?=$nNoticeID?>" style="position:absolute;left:0;top:10;width:100%" onMouseover="scrollspeed=0" onMous
eout="scrollspeed=cache">



<?
$sSqlGetNoticeContent = "select noticecontent from noticeboard where noticeid='$nNoticeID'";
$rsSqlGetNoticeContent = &$sConn->Execute($sSqlGetNoticeContent) or die ("Error: ****!!!");
$sNoticeContent = $rsSqlGetNoticeContent->fields('noticecontent');
$rsSqlGetNoticeContent->Close();
$sConn->Close();

echo $sNoticeContent;
?>



<div>

<script language="JavaScript1.2">

//<iframe> script by Dynamicdrive.com

//Specify speed of scroll. Larger=faster (ie: 5)
//Adjust scrollspeed and setTimeout timer value to create paused messages
var scrollspeed = cache = <?=$nScrollSpeed?> // this determines how large a step to be taken in
// scrolling (how much 'ground', measured in pixels to be covered)
var divid = <?=$nNoticeID?>;
var initialfromtop = <?=$nInitialFromTop?>;
var rate = <?=$nRate?>;

function initialize(){
// marqueeheight = document.all ? parent.document.all.datamain.height : parent.document.getElementById("datamain").getAt
tribute("height")
// dataobj = document.all ? eval('document.all.datacontainer' + divid) : eval('document.getElementById("datacontainer' +
divid + '")')
dataobj = eval('document.all.datacontainer' + divid)
// dataobj = document.all.datacontainer1

dataobj.style.top = initialfromtop // set to original position
thelength = dataobj.offsetHeight // offsetHeight to get the total length of message

scrolltest()
}

function scrolltest(){
dataobj.style.top = parseInt(dataobj.style.top) - scrollspeed

if (parseInt(dataobj.style.top) < thelength * (-1))
dataobj.style.top = initialfromtop // resets scroller to its original position, higher the number, further away
// the message scroller is from top of IFRAME

setTimeout("scrolltest()", rate) // second argument determines how long you want to pause the message
// before scrolling off again
}

window.onload=initialize

</script>

</body>
</html>

Sorry for being messy, but can anyone help? Thank you

__________________
Beginner

June 18th, 2003, 03:15 AM

fakker

The calm b4 the storm

Join Date: Jul 2002

Location: Manchester, UK

Posts: 404

Time spent in forums: < 1 sec
Reputation Power: 6

is there an online version we could have a look at?

thanks....

__________________
Matt 'Fakker' Facer

mattfacer.com

June 23rd, 2003, 03:49 AM

tim

Contributing User

Join Date: Jun 2002

Posts: 62

Time spent in forums: 12 m 9 sec
Reputation Power: 6

which one do you mean? if it's the copy of code i have just posted, no. It's somewhere in www.dynamicdrive.com but i have lost the link to it.

July 9th, 2003, 10:19 PM

tim

Contributing User

Join Date: Jun 2002

Posts: 62

Time spent in forums: 12 m 9 sec
Reputation Power: 6

yeah, got to the link ....here

http://www.dynamicdrive.com/dynamic...me-scroller.htm

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