Introduction to CSS hack writing methods in different browsers

Differentiation between CSS hack writing methods in different browsers:

Differentiation between IE6 and FF:
Backgroundrange;*blue; < /span>

Differentiation between IE6 and IE7:
background:green !important;blue; < /span>

The difference between IE7 and FF:
backgroundrange; *background:green;

The difference between FF, IE7 and IE6:
backgroundrange;*background:green !important;*blue; < /span>

Note: IE can recognize it*; standard browsers (such as FF) cannot recognize it*;

IE6 can Recognize *, but not !important,
IE7 can recognize *, but can also recognize !important;
FF cannot recognize *, but can recognize !important;
Add another one, underline "_",
IE6 supports underline, but neither IE7 nor firefox supports underline.

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