Opacity in CSS

Today we learn about opacity in CSS! I made an example here and here you have the files.

Information about opacity in CSS:

The opacity property takes a value of the amount of transparency from 0.0 to 1.0. 0.0 is 100% transparent - anything below that element will show completely through. 1.0 is 100% opaque - nothing below the element will show through.

So to set an element to 50% transparent, you would write: opacity:0.5;

Neither IE 6 nor 7 support the CSS 3 opacity property. But you're not out of luck. Instead, IE supports a Microsoft-only property "alpha filter". Alpha filters in IE accept values from 0 (completely transparent) to 100 (completely opaque). So, to get your transparency in IE, you should multiply your opacity by 100 and add an alpha filter to your styles:

Alpha filter for IE: filter: alpha(opacity=50);
Alpha filter for Mozilla: -moz-opacity:0.5;

More info on About.com . Now let's to see my example…

1. Open Notepad and type this.

In this example i create an html page with css very simple. I put a background image and a div with the background color black. At this div I low the Opacity at 70%! In the next picture you have the div without opacity… is ugly!

Saw what you need to do is to write this code at the div opacity: 0.70;

That's it! Is very simple… here is the final result and here is an Lorem Ipsum Generator! Thank you!