Showing CSS to IE only (The Underscore Hack)
It allows you to show CSS to Internet Explorer only, omitting Mozilla, Safari and Opera.
It allows you to write conditional CSS directly in your stylesheet file, and doesn’t require inline styles
It works for IE 5.0, 5.5 and 6.0
It’s a hack
It’s very simple to work with.
body { background: green; /* show to Mozilla/Safari/Opera */ _background: red; /* show to IE */ }
Cons
The CSS won’t validate
The hack won’t work for IE5/Mac. For this platform, I recommend the IE5/Mac Band Pass Filter hack