导读：
前提：不考虑IE6以下的版本、且运行环境为标准模;IE11未做测试
IE6 CSS Hack
IE6 CSS Hack only
/* For IE6 and earlier */
* html .demo{color:#090;}
.demo{_color:#090;}
other IE6 CSS Hack
.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 */}