Newbie question on document model   

I'm trying to automate the navigation of a web page, and I'm having to learn 
as I go so if you tell me I'm doing it the hard way, believe me I will 
listen.  My VBA program is picking out items by name, selecting options from 
drop-down lists as it goes, and next I want to push a button.

Now, I can see the button right in front of me on the web page, plainly 
labeled "SUBMIT".  On mouseover, MSIE tells me it will link not to a URL but 
to "javascript:checkAvailability();".  But when I browse manually through 
Document.All for this button, so that I can tell my program how to refer to 
it, I don't see it at anywhere.  In fact the .All collection ends after the 
256th item, a suspicious coincidence although nothing in the documentation 
that I can find hints that the .All collection should be so limited.  The 
256th item is several tags, above the button, so the impression I get is that 
.All simply doesn't go down all the way through the HTML definition.

So is there something I don't know about the document model that would tell 
me where this button is defined?  What am I missing?

Feel free to contact me at rhbridg @ attglobal.net, if you prefer.

date: Sat, 7 Jun 2008 15:22:00 -0700   author:   Bob Bridges