Quote:
Originally Posted by Toxaris
Mostly things that is for text-to-speech and things like that. Also several pseudo-classes and pseudo-elements are not supported like hover. However, most readers do not support pseudo-elements anyway. In general you can say that the more complex the CSS will be, the less chance there is it will be supported at this time.
In paragraph 3.3 of the link I sent you can see what the default values are. There you can also see for example that the default value for the auto margin is 0.
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The list of pseudo elements:
Code:
Selector Example Example description
:link a:link Selects all unvisited links
:visited a:visited Selects all visited links
:active a:active Selects the active link
:hover a:hover Selects links on mouse over
:focus input:focus Selects the input element which has focus
::first-letter p::first-letter Selects the first letter of every <p> element
::first-line p::first-line Selects the first line of every <p> element
:first-child p:first-child Selects every <p> elements that is the first child of its parent
::before p::before Insert content before every <p> element
::after p::after Insert content after every <p> element
:lang(language) p:lang(it) Selects every <p> element with a lang attribute value starting with "it"
Personally I have never used any of those elements besides hyper links and a:visited and a:visited are supported, other elements are irrelevant if you don't use javascript.