CSS 鼠标经过图片滤镜灰色效果

A IMG { FILTER: gray;}
A:hover IMG {FILTER:}
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<h2>默认图片是灰的鼠标放上去变亮变清晰了</h2><A href=http://www.51zjs.cn><IMG src="/UploadFile/taobao0903/love18qingerenjie_0205_510X250_hjj.jpg" border="0"></A>
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