Rami,

 

All HTML Element IDs must start with a letter (A-Za-z) and can be followed by any number of letters, digits(0-9), hyphens, underscores, colons and periods.

 

Keith 

Hi Keith,

Thanks for your answer. 

 

So this is based on some "rule" or regulation. I found a work around to my problem, but I'm trying to learn the real facts, so we can avoid doing stuff wrong (since Domino allows this but Xpages not).