/* all browsers other than the ones listed will ignore these rules because they are INVALID CSS */
.iehacks1 { _property: value; } /* IE6 and below processes as property:value */
.iehacks2 { -property: value; } /* IE6 and below processes as property:value */
.iehacks3 { *property: value; } /* IE7 and below processes as property:value */
.iehacks4 { .property: value; } /* IE7 and below processes as property:value */
.iehacks5 { property: value !ie; } /* IE7 and below will still apply this rule */
.iehacks6 { property: value !important!; } /* IE7 and below will still apply this rule, WITH the important attribute */

html* {color: black;} /* IE7 and below treats this as "html *" */
** {margin: 0;} /* IE7 and below treats this as "* *" */
           
>div {margin: 1px;} /* IE7-only treats this as "*>div" */
+div {margin: 2px;} /* IE7-only treats this as "*+div" */
~div {margin: 3px;} /* IE7-only treats this as "*~div" */

/* adding a \0 before the media type apparently still works for ie8 */
@media \0screen 
{
    .ie8only
    {
        background: tomato;
    }
}