This CssHack shows rules to InternetExplorer on Mac and Windows.
When in Standards Compatibility mode, IE7 does not apply rules that use this hack.
Working example on EmulatingFixedPositioning.
/* the following rules apply only to IE6 */
* html{
}
* html body{
}
* html .foo{
}
Only for IE7
/* the following rules apply only to IE7 */
*+html .foo{
}