How can I implement this feature in Mozilla htmlparser?

Hi,
   I am now trying to implment the HTML meter element. I have some
troubles in the following condition:

   I want all the children of the <meter> elements to be ignored but I
need the text in the children elements. For example:

   <meter><span> 50% </span></meter>.

   I don't want there is DOM node for the <span> in the DOM tree. But
I need to parse the 50% to set the Meter to a right place...

   Could anybody tell me how can I achieve this?

   Thanks!

Regards!
Bo