How would I go about finding out if it's undefined?

It's a button

<span class="button"><a href="javascript:clickedButton('submitLogin');
+">
 <img xmlns="http://www.w3.org/1999/xhtml" title="" src="en/images/lan
+guage_sensitive_images/pagegraphics/buttons/image/go.gif" class="" al
+t=""/>
</a></span>

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In reply to Re^2: Win32::IE::Mechanize trouble by xgamma
in thread Win32::IE::Mechanize trouble by xgamma

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