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嗨,我正在使用 Microsoft Expression Web 4 制作一个网站,当我将鼠标悬停在它上面时,我想让一个链接淡入另一个图像,代码是:

.about { background: url('../images/aboutbutton1.png') no-repeat;
min-height: 50px;
max-width: 150px;
-moz-transition: background .45s linear;
-webkit-transition: background .45s linear;
transition: background .45s linear;
}

.about:hover {
background: url('../images/aboutbutton2.png') no-repeat;
min-height: 50px;
max-width: 150px;
-moz-transition: background .45s linear;
-webkit-transition: background .45s linear;
transition: background .45s linear;
}

但每次我这样做它都不会褪色它只是切换!请帮忙!

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