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多个浏览器对容器宽度实际像素的解释
简介IE/Opera： 对象的实际宽度 = (margin-left) + width + (margin-right) Firefox/Mozilla： 对象的实际宽度= (margin-left) + (border-left-width) + (padding- left) + width + (
IE/Opera：
对象的实际宽度 = (margin-left) + width + (margin-right)
Firefox/Mozilla：
对象的实际宽度= (margin-left) + (border-left-width) + (padding- left) + width + (padding-right) + (border-right-width) + (margin-right)
对象的实际宽度 = (margin-left) + width + (margin-right)
Firefox/Mozilla：
对象的实际宽度= (margin-left) + (border-left-width) + (padding- left) + width + (padding-right) + (border-right-width) + (margin-right)