printing out variables

Hi,
I'm pretty new to Javascript but I do come from a programming background.
I have a script from a book (on Ajax) that doesn't work, which isn't much of a surprise since half the scripts in this books source code don't work (Ajax for Dummies).

Anyway, I'm printing out variables using an alert statement but when I get to the statement below the message I get back is "[objectHTMLCollection]". Can someone tell me how I can print out the contents of that object?

-- Snip --
options = xmlDocument.getElementsByTagName("option");
alert(options);
---


Thanks!

M

.

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