区别IE6与FF:
backgroundrange;*blue; < /span>
区别IE6与IE7:
background:green !important;blue; < /span>
区别IE7与FF:
backgroundrange; *background:green;
区别FF,IE7,IE6:
backgroundrange;*background:green !important;*blue; < /span>
注:IE都能识别*;标准浏览器(如FF)不能识别*;
IE6能识别*,但不能识别 !important,
IE7能识别*,也能识别!important;
FF不能识别*,但能识别!important;
另外再补充一个,下划线"_",
IE6支持下划线,IE7和firefox均不支持下划线。