Rick, Do you mean that <table border="2"> and <table style="border:2px"> don't mean the same thing? Their names suggest they do the same things. That's a terrible naming. Changing the former to the latter does fix the problem though. Why is that?
Using the #+HTML_HEAD_EXTRA options as you suggest can also fix the problem. But could you explain why using the HTML_HEAD_EXTRA is more advisable than setting the <table style="border:2px"> directly as table attributes? What would you suggest if we want some tables have orders and others don't have borders in the same html webpage? Thank you. Shiyuan > Org mode generated this line in the html for table but the border is > not > > displayed, > > <table border="2" cellspacing="0" cellpadding="6" rules="groups" > > frame="hsides"> > > The "border" attribute has nothing to do with it. It's the "frame" > attribute > which sets the default top and bottom borders. > > > If we use css style to specify the border,  the table border would > show > > up: > > <table style="border:2px" cellspacing="0" cellpadding="6" > rules="groups" > > frame="hsides"> > > No. The CSS should be in the header, not an attribute of the tag. Have you > tried setting the 'HTML_HEAD_EXTRA' option? somehting like: > #+HTML_HEAD_EXTRA: <style type="text/css"> > #+HTML_HEAD_EXTRA: table {border-left: 1px solid black; border-right: 1px > solid black;} > #+HTML_HEAD_EXTRA: </style> > > > rick >