how to use table tr:odd td in html

When I define this CSS in HTML I found that they not show me even in Firebug but I see after edit button Firebug CSS panel [tab]

#tbl tr:odd td{
    background: none repeat scroll 0 0 #FFFFFF;
}

well I want to make tr'开发者_JAVA技巧s background color #FFF.

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According to CSS3, even and odd are actually arguments to the :nth-child() pseudo-class, not selectors in their own right. Try:

#tbl tr:nth-child(odd) td {
    background: none repeat scroll 0 0 #FFFFFF;
}

Of course, your browser has to support CSS3 for the above to work.