为什么这个CSS3动画能在IE或Firefox中运行？

Question

我正在使用jQuery在Flash横幅上触发此类，它在Safari和Chrome中完美运行，但在Firefox或IE中却无法运行。 jQuery的工作原理只是CSS3淡入淡出而不是：

.opacityChange {
-webkit-animation: opacityChange 1s forwards;
-moz-animation: opacityChange 1s forwards;
-o-animation: opacityChange 1s forwards;
-ms-animation: opacityChange 1s forwards;
animation: opacityChange 1s forwards;
}


@-webkit-keyframes opacityChange {
0% {opacity:0;}
100% {opacity:1;}
}

@-moz-keyframes opacityChange {
0% {opacity:0;}
100% {opacity:1;}
}

@-o-keyframes opacityChange {
0% {opacity:1;}
100% {opacity:1;}
}

@-ms-keyframes opacityChange {
0% {opacity:1;}
100% {opacity:1;}
}

@keyframes opacityChange {
0% {opacity:1;}
100% {opacity:1;}
}