CSS3 Transform Perspective Not Working in FF or IE - Swing Effect

Question

I'm relatively new to CSS3 transform and keyframe animations so tend to stick to CSS generators or ripping other examples. I have modified the example shown here for my own purposes which works great in Chrome but not in FF or IE - http://webbb.be/blog/making-a-swinging-effect-with-css3-animations/.

See my example below (js fiddle included), in essence this is a swing effect on hover using perspective but the perspective doesn't seem to work in FF and IE.. I have only added the -moz- pre fix to the example below... any ideas?

a  {  display: block;
float:left;
text-indent: -999px;
overflow: hidden;
height: 100px;
width: 100px;
background: red;
cursor: pointer;

}

.perspective { 
position: relative; 
-webkit-perspective: 350;
-moz-perspective: 350;
width: 100px;
height: 100px;
}

.perspective .swing {
position: relative; 
z-index:1;
-webkit-transition: all 250ms ease;
-moz-transition: all 250ms ease;
}

a.swing:hover {
-webkit-transform-origin: top;
-moz-transform-origin: top;
-webkit-animation: balance 1.5s ease-in-out 110ms 1 alternate;
-moz-animation: balance 1.5s ease-in-out 110ms 1 alternate;
}


@-webkit-keyframes balance { 
25% { -webkit-transform: rotateX(-60deg); }  
45% { -webkit-transform: rotateX(50deg); } 
69% { -webkit-transform: rotateX(-30deg); } 
90% { -webkit-transform: rotateX(30deg); } 
100% { -webkit-transform: rotateX(0deg);} 
}


@-moz-keyframes balance { 
25% { -moz-transform: rotateX(-60deg); }  
45% { -moz-transform: rotateX(50deg); } 
69% { -moz-transform: rotateX(-30deg); } 
90% { -moz-transform: rotateX(30deg); } 
100% { -moz-transform: rotateX(0deg);} 
}

http://jsfiddle.net/7ejF7/1/

Answer 1

You need to add px values for perspective to work on non-webkit browsers.

-moz-perspective: 350px;

http://jsfiddle.net/mZMGd/

Answer 2

Try to add the statement for none -webkit- or -moz- browsers.
i haven't tried it but it could be the solution.

transform-origin: top;
animation: balance 1.5s ease-in-out 110ms 1 alternate;


@keyframes balance { 
     25% { transform: rotateX(-60deg);}  
     45% { transform: rotateX(50deg); } 
     69% { transform: rotateX(-30deg); } 
     90% { transform: rotateX(30deg); } 
     100% { transform: rotateX(0deg);} 
}

TJL