Opacità e trasparenza

• CSS Opacity on image mouse-over
• Easy cross-browser transparency
• CSS Cross Browser Transparency
• CSS Transparency for Internet Explorer (IE), Mozilla and Safari
• .PNG alpha transparency hack limitations
• Easy cross-browser transparency
• Making IE use PNG Alpha transparency
• PNG overlay using one single Image element
• PNG Overlay
• The easiest way to PNG support in IE6
• Exploring OpacityStep-by-Step
• Opacity on Background with Fully Opaque Text
• Normal display of PNG Alpha Transparency with MSIE
• One PNG, two browsers, no hacks
• CSS And Opacity
• 32-bit PNG degradability in IE
• Transparent Backgrounds in Win IE
• Improved PNG Behavior
• The PNG problem in Windows Internet Explorer
• Cross-browser semi-transparent backgrounds