• Adobe - Developer Center
  Creating animation in ActionScript 3.0 Tween !! Motion !! Fade !! Explicadinho !! VEJA O RESTANTE DAS PÁGINAS !!!
  in Tutorial > Actionscript with alpha animar as3 easing fade motion tween
  Note: Ver o restante das páginas !!!!!
• css - CSS3 Transparency + Gradient - Stack Overflow
  /* webkit example */ background-image: -webkit-gradient( linear, right top, left top, from(rgba(255, 255, 255, 1.0)), to(rgba(255, 255, 255, 0)) ); /* mozilla example - FF3.6+ */ background-image: -moz-linear-gradient( right center, rgba(255, 255, 255, 1.0) 20%, rgba(255, 255, 255, 0) 95% ); /* IE 5.5 - 7 */ filter: progid:DXImageTransform.Microsoft.gradient( gradientType=1, startColor=0, endColorStr=#FFFFFF ); /* IE8 uses -ms-filter for whatever reason... */ -ms-filter: progid:DXImageTransform.Microsoft.gradient( gradientType=1, startColor=0, endColoStr=#FFFFFF );
  in Tutorial > HTML_CSS with alpha css gradient opacity

alpha from all users