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<!DOCTYPE html> <html> <head> <title>CSS opacity 实例 - 自学教程(runoops.com)</title> <style> div { background-color: red; opacity: 0.5; filter: Alpha(opacity=50); /* IE8 and earlier */ } </style> </head> <body> <div>This element's opacity is 0.5! Note that both the text and the background-color are affected by the opacity level!</div> </body> </html>
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