<HTML><BODY>
<H1> test_include1 </H1>
  undefined (TRUE), so including test_if2 ...
<HTML><BODY>
<H1> test_if2 </H1>
  undefined (TRUE)
 (if test 1) 

 VAR2 defined (TRUE)
  (if test 2) 

 defined (if test 3 level 1) VISIBLE
 VAR2 VISIBLE (if test 3 level 2)
 VAR2 defined VISIBLE  (if test 3 level 3)
 --- visible ---
  
  

<H1> END test_if2 </H1>
</body></html>

 (include test 1) 
</body></html>