[Greasemonkey] XPATH pattern

[Chris Hayes]

I am rebuilding a html page (phpfreakz.nl).


The messages have this basic setup (very simplified)

<table>
  <tr> <td> title
  <tr> <td> entered : data
  <tr> <td> modified:  date            // this  table row is only added 
when modification made
  <tr> <td>  <div><div><span></span><hr>
  <tr> <td> CONTENT
  <tr> <td> varying buttons
</table>

Now I want to use a pattern to grab the CONTENT.
There are no name's or id's to use to get there quickly.
Since the modified date is sometimes present, i should not use   
.//TABLE/tr[4] because it can also be .//TABLE/tr[5]


I hope to catch it by saying:
 
give me the TR content of the TR that comes after the TR with the HR in it.


Is anybody experienced with such reversing search patterns?

I am thinking in the direction of     
.//TABLE/TR//HR/parent::/following-sibling::

but here I am only going one parent up, which is maybe not the TR: can I 
go up and specify to go up to TR?

(The option to do a test on innerHTML is inconvenient in the script I am 
using, though not impossible)

 Alternatives: the TR with the HR in it has colspan=2. Maybe that's a 
way to catch it!