Opacity in CSS
Wednesday, November 7th, 2007
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;
