IE6,7,8,9,10Hack

IE6

.demo{_color:#F00}

IE7

* + .demo{color:#F00}

IE7以下

.demo{*color:#090;/* For IE7- */}
.demo{+color:#090;/* For IE7- */}
.demo{#color:#090;/* For IE7- */}
.demo{>color:#090;/* For IE7- */}
.demo{.color:#090;/* For IE7- */}
.demo{color:#090\9;/* For IE6+ */}
.demo{[;color:#f00;];/* For IE7- and webkit */}
.demo{color:#090\9;/* All IE */}

IE8

.demo{color::#09F\0/}/* For IE8 */