title: Firefox issue with currentStyle vs getComputedStyle
body: <p>I am trying to get the width of an element according to it's CSS rules  The problem is that "getComputedStyle" returns a pixel value instead of "auto" for an element with no CSS width value set.  In Opera, "elem.currentStyle['width']" returns "auto", but in firefox, it must use "getComputedStyle" which returns something like "1149px". </p>
  
  <p>It is vital for me to know what the actual CSS rule is.  Is there some way of doing this besides besides getComputedStyle? <a href="https://developer.mozilla.org/en/CSS/used_value" rel="noreferrer">The Firefox MDN</a> makes it clear "getComputedStyle" is not the way to go, but I cannot find any documentation for a Firefox equivalent to "currentStyle".</p>
  
  <p>If you want to know, my end goal is to find the largest static-width element on the page. 
   If I cannot read stylesheet values - only rendered/computed values - 
   then how can I achieve this? </p>