Object required error: When do I call my code?
Nathan Sokalski
Error: Object required
I have determined, after some experimenting, that this is due to the fact
that the HTML has not been parsed when the script is called. Here are two of
the variations of the page:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
function SlideIntoView(id)
{window.alert(document.getElementById(id).id);}
SlideIntoView('divContentArea');
</script>
</head>
<body>
<div id="divContentArea"></div>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
function SlideIntoView(id)
{window.alert(document.getElementById(id).id);}
</script>
</head>
<body onload="SlideIntoView('divContentArea');">
<div id="divContentArea"></div>
</body>
</html>
The only difference between the two pages is that the statement
SlideIntoView('divContentArea');
Is located inside the script tag in the first version, and in the body's
onload eventhandler in the second. The first gives the Object required error
message, but the second works fine. However, with all the code that
sometimes needs called right away, and that gets added dynamically in
server-side development, it would be unrealistic to need to put it all in
onload. I have never needed to worry about this before (I am currently using
IE7). How can I make sure the browser has parsed the HTML before calling the
code? Any help would be appreciated. Thanks.
--
Nathan Sokalski
njsok...@hotmail.com
http://www.nathansokalski.com/
Igor Tandetnik
> Is located inside the script tag in the first version, and in the
> body's onload eventhandler in the second. The first gives the Object
> required error message, but the second works fine. However, with all
> the code that sometimes needs called right away, and that gets added
> dynamically in server-side development, it would be unrealistic to
> need to put it all in onload. I have never needed to worry about this
> before (I am currently using IE7). How can I make sure the browser
> has parsed the HTML before calling the code?
You have to call that code in response to onload event, no way around it. However, writing onload= attribute is not the only way to
handle onload event. You can do something like
window.attachEvent('onload', function() {DoWhatever();});
You can attach more than one handler this way.
--
With best wishes,
Igor Tandetnik
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