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Returning "null" or "false" if nextSibling doesn't exist

127 New Member
Hi all,

I have a routine that checks to see if an ID has been set for the next row down in a table. Everything works fine except if I'm on the last row and no row exists; the routine just hangs:

Expand|Select|Wrap|Line Numbers
  1. var checkNext = obj.parentNode.parentNode.nextSibling.id;
  2.  
Any ideas how I can get this to return "null" or "false" is there isn't a subsequent row in the table?

Many thanks in advance!
Jul 25 '09 #1
3 7304
Dormilich
8,658 Recognized Expert Moderator Expert
you can test for the next sibling first
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  1. if (obj.parentNode.parentNode.nextSibling)
  2. // or
  3. if ("undefined" == typeof obj.parentNode.parentNode.nextSibling)
Jul 25 '09 #2
phub11
127 New Member
Works like a charm!

Thanks!

@Dormilich
Jul 25 '09 #3
Dormilich
8,658 Recognized Expert Moderator Expert
you could do even more...
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  1. if (sibl = obj.parentNode.parentNode.nextSibling)
  2. {
  3.     var checkNext = sibl.id;
  4. }
  5. // ...
Jul 25 '09 #4

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