[Javascript] JavaScript error: Class doesn't support Automation

[javascript@xxxxxxxxxx (walterash)]

Each time I open a window without a URL specified and then try to do 
anything (like write to it), IE 6 gives me this error.  I tried 
reverting to the IE version that came with XP and the problem did 
not go away.  Can this really be a problem with IE6 and Javascript 
or is there something I can fix with my version of IE. 

Here's some code from another site (I'm sure webshots.com won't mind 
if I borrow it for demonstration purposes) that behaves the same way 
(just so you know it's not an error in my code):
-----------
function openwin(name,w,h,scrollbars,resizable,url)
{
	var left = (screen.width-w)/2;
	var top = (screen.height-h)/2;

	var win = window.open("",name,"width=" + w + ",height=" + h 
+",scrollbars=" + scrollbars +",resizable=" + resizable 
+",screenx="+left+",screeny="+top+",left="+left+",top="+top);
	if (url)
		win.location.href=url;
	win.focus();
}

function onClickPoster()
{
	document.location.href = "http://www.webshots.com/g/32/596-
sh/17275.html?blockPop=1";
	openwin("poster", 640, 
430, "yes", "yes", "http://www.webshots.com/g/poster/75/17275_poster.
html");
}
-------------
When onClickPoster is called, IE6 opens "About:Blank" and give the 
error message.

Thank you for any assistance.

Walter Harder