Css:Conditional comments(條件注釋)

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item example comment

! [if !ie] the not operator. this is placed immediately in front of the feature, operator, or subexpression to reverse the boolean meaning of the expression.

lt [if lt ie 5.5] the less-than operator. returns true if the first argument is less than the second argument.

lte [if lte ie 6] the less-than or equal operator. returns true if the first argument is less than or equal to the second argument.

gt [if gt ie 5] the greater-than operator. returns true if the first argument is greater than the second argument.

gte [if gte ie 7] the greater-than or equal operator. returns true if the first argument is greater than or equal to the second argument.

( ) [if !(ie 7)] subexpression operators. used in conjunction with boolean operators to create more complex expressions.

&amp; [if (gt ie 5)&amp;(lt ie 7)] the and operator. returns true if all subexpressions evaluate to true

| [if (ie 6)|(ie 7)] the or operator. returns true if any of the subexpressions evaluates to true