Essayez-le vous-même - CSS Reference js

<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {
   width: 100px;
   height: 100px;
   background: red;
   position: relative;
   -webkit-animation: mymove 1s infinite; /* Chrome, Safari, Opera */
   animation: mymove 1s infinite;
}

/* Chrome, Safari, Opera */
@-webkit-keyframes mymove {
   from {left: 0px;}
   to {left: 200px;}
}

/* Chrome, Safari, Opera */
@-webkit-keyframes mynewmove {
   from {top: 0px;}
   to {top: 200px;}
}

@keyframes mymove {
   from {left: 0px;}
   to {left: 200px;}
}

@keyframes mynewmove {
   from {top: 0px;}
   to {top: 200px;}
}
</style>
</head>
<body>

<p>Click the "Try it" button to change the value of the animation property.</p>
<button onclick="myFunction()">Try it</button>

<script>
function myFunction() {
   document.getElementById("myDIV").style.WebkitAnimation = "mynewmove 4s 2"; // Code for Chrome, Safari and Opera
   document.getElementById("myDIV").style.animation = "mynewmove 4s 2";
}
</script>

<p><strong>Note:</strong> The animation property is not supported in Internet Explorer 9 and earlier versions.</p>

<div id="myDIV"></div>

</body>
</html>

/* Chrome, Safari, Opera */
@-webkit-keyframes mymove {
    from {left: 0px;}
    to {left: 200px;}
}

/* Chrome, Safari, Opera */
@-webkit-keyframes mynewmove {
    from {top: 0px;}
    to {top: 200px;}
}

@keyframes mymove {
    from {left: 0px;}
    to {left: 200px;}
}

@keyframes mynewmove {
    from {top: 0px;}
    to {top: 200px;}
}
</style>
</head>
<body>

<p>Click the "Try it" button to change the value of the animation property.</p>
<button onclick="myFunction()">Try it</button>

<p><strong>Note:</strong> The animation property is not supported in Internet Explorer 9 and earlier versions.</p>

</body>
</html>