css hacks

* html selector                    /* for IE6 and below */

*+html selector                  /* for IE7 and IE5 */

*:first-child+html selector  /* for IE7 only */

html>body selector            /* for IE7+ and other standard browsers */

html>/**/ body selector   /* for not IE */

_property:value                  /* for IE6 and below */

*property:value                  /* for IE7、6、5 */

porperty:value\0/              /* for IE8 */

porperty:value\9                /* for all IE */