CSS 3背景图像转换

Question

CSS 3背景图像转换我正在尝试使用css转换来产生“淡入淡出”效果。但我不能让它和背景图像一起工作.。CSS：.title a {     display: block;     width: 340px;     height: 338px;     color: black;     background: transparent;     /* TRANSITION */     -webkit-transition: background 1s;     -moz-transition: background 1s;     -o-transition: background 1s;     transition: background 1s;}.title a:hover {     background: transparent;     background: url(https://lh3.googleusercontent.com/-p1nr1fkWKUo/T0zUp5CLO3I/AAAAAAAAAWg/jDiQ0cUBuKA/s800/red-pattern.png) repeat;     /* TRANSITION */     -webkit-transition: background 1s;     -moz-transition: background 1s;     -o-transition: background 1s;     transition: background 1s;}看一看：http://jsfiddle.net/AK3La/