Browser support for CSS and DHTML

by "John Aitchison" <jaitchis(at)hwy.com.au>

 Date:  Tue, 26 Jun 2001 12:43:13 +1000
 To:  hwg-basics(at)hwg.org
  todo: View Thread, Original

Hi,

I am relatively new to the area, and still trying to sort out some 
concepts .. any help would be appreciated.

CSS BROWSER SUPPORT
-------------------------------------
>From this site, 
http://www.webreview.com/style/css1/charts/mastergrid.shtml

it would appear that 'most' CSS1 features are supported by Navigator 4.6 
and above and anything above IE4 looks fairly safe. It also says, in the 
FAQ that Navigator 3 has no CSS support.

As a broad statement, would it be fair to say that I should have 
relatively few difficulties with a conservative usage of CSS1 - is it 
reasonable to assume that the vast majority of browsers out there are at 
NN4.6 and above or IE4 and above?

now, wrt CSS2 , it seems that Navigator4.6 and IE 4 are about on a par, 
but that you really need to got to Navigator6 or IE5 or above for a fuller 
implementation of CSS2.  

I am interested in pagination support, but I don't know enough yet about 
paged media CSS features  to be able to figure out whether the CSS2 
implementation table at
http://www.webreview.com/style/css2/charts/selectors.shtml
tells me which browsers support it.
Can anyone enlighten me?

Finally a dumb/newbie question on CSS.  Is a CSS always 'safe'? as in, if 
a page with a modern CSS is viewed in an older browser, will it look OK .. 
as in, will the newer features be simply ignored. Or should I really think 
about browser specific style sheets, and include them appropriately (I 
don't even know if this is feasible).



DHTML
---------

I am really lost here. There are a couple of really basic things I don't 
understand

a) is DHTML a Microsoft only gizmo? I went to W3C and saw no obvious 
mention of it, but a search from the w3c site revealed various 
newsgroup/email messages talking about it.  So if I use DHTML, and it is 
Microsoft specific, what happens in Netscape etc. Similar questions re 
older browsers as for CSS.

b) why do I need it? in my brief acquaintance with it, it seems like 
rebranded javascript. Or am I being more than usually obtuse.




Any comments, pointers to RTFM, elucidation of concepts .. would be 
gratefully received.

Thanks


John Aitchison

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