[转]专属 CSS Hack

html:first-child #opera { /* Opera */
        display: block;
}

html > body #ie7 { /* IE 7 */
        *display: block;
}

body #ie6 { /* IE 6 */
        _display: block;
}

body:empty #firefox12 { /* Firefox 1 - 2 */
        display: block;
}

@-moz-document url-prefix() { /* Firefox */
        #firefox { display: block; }
}

@media screen and (-webkit-min-device-pixel-ratio:0) { /* Safari */
        #safari { display: block; }
}

@media all and (-webkit-min-device-pixel-ratio:10000), not all and (-webkit-min-device-pixel-ratio:0) { /* Opera */
        head~body #opera { display: block; }
}