Cromeless windows diffrent Urls

I took a look at : http://www.kirupa.com/developer/mx2004/chromeless.htm
I was wondering if you could let “var b” in the javaskript undifinde. And then defining it in the link in the lfah movie

like:

chromeless.onPress = function()
{
	getURL("javascript:myChromeless.openChromeless(b=http://www.kirupa.com/newdesign/tutlist.htm)");	
}

and if you can do such a thing. can you let 2 or more vars undifinde. like b and y

chromeless.onPress = function()
{
	getURL("javascript:myChromeless.openChromeless(b=http://www.kirupa.com/newdesign/tutlist.htm, y=Example by Kirupa)");	
}

Just wondering, please help me out. TNX
regards, T-O