Parsing ie, FireFox, Opera browser Support Alpha Transparent method _ Experience Exchange

First, look at the following code:
Copy the Code code as follows: Filter:alpha (OPACITY=50); /* IE */
-moz-opacity:0.5; /* Moz + FF */
opacity:0.5; /* Browsers that support CSS3 (FF 1.5 is also supported) */
Simply explained, IE uses private attribute filter:alpha (opacity), Moz family uses private attribute-moz-opacity, while the standard attribute is opacity (CSS 3, Moz family section supports CSS3). The values that follow are transparency, using percentages or decimals (alpha (opacity)) to use values greater than 0 and less than 100, which are actually percentages.

You don't see opera from the above code. Yes, opera does not yet support standard opacity, nor does it have a proprietary property that supports alpha transparency.

We know, however, that opera is a PNG image that supports alpha transparency (and of course Moz family support). So we can use the background image to achieve the alpha transparency effect.

Example: http://realazy.org/lab/alpha/

The key is:
Copy the Code code as follows: Background:transparent URL (alpha80.png) left top repeat!important;
Background: #ccc;
Filter:alpha (OPACITY=50);
Since Moz family supports alpha Transparent PNG, it's not necessary to use its private properties. Of course, you can use the standard opacity, but don't use alpha transparent pictures and opacity at the same time, so that's a mixture of the two. You can download the above example, and then/*opacity:. 5;*/'s comments to see.

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