区别IE6与FF:
background:orange;*background:blue;
区别IE6与IE7:
background:green !important;background:blue;
区别IE7与FF:
background:orange; *background:green;
区别FF,IE7,IE6:
background:orange;*background:green !important;*background:blue;
background:orange;*background:blue;
background:green !important;background:blue;
background:orange; *background:green;
background:orange;*background:green !important;*background:blue;
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