Use CSS to implement Alpha transparency supported by Firefox and IE, and firefoxalpha

Use CSS to implement Alpha transparency supported by Firefox and IE, and firefoxalpha

Sometimes, to achieve some special effects, you need to make the page elements transparent. This article describes how to use CSS to achieve the Alpha transparency supported by Firefox and IE.
CSS:

Filter: alpha (opacity = 50);/* IE */

-Moz-opacity: 0.5;/* Moz + FF */

Opacity: 0.5;/* supports CSS3 browsers (FF 1.5 is also supported )*/
IE uses the private attribute filter: alpha (opacity), Moz Family uses the Private Attribute-moz-opacity, and the standard attribute is opacity (CSS 3, Moz Family supports CSS3 ). The following value is transparency, with percentages or decimals.