css3 简单动画

<script>
<!--
var x,y,n=0,ny=0,rotINT,rotYINT
function rotateDIV()
{
x=document.getElementById("rotate1")
clearInterval(rotINT)
rotINT=setInterval("startRotate()",10)
}
function rotateYDIV()
{
y=document.getElementById("rotatey1")
clearInterval(rotYINT)
rotYINT=setInterval("startYRotate()",10)
}
function startRotate()
{
n=n+1
x.style.transform="rotate(" + n + "deg)"
x.style.webkitTransform="rotate(" + n + "deg)"
x.style.OTransform="rotate(" + n + "deg)"
x.style.MozTransform="rotate(" + n + "deg)"
if (n==180 || n==360)
	{
	clearInterval(rotINT)
	if (n==360){n=0}
	}
}
function startYRotate()
{
ny=ny+1
y.style.transform="rotateY(" + ny + "deg)"
y.style.webkitTransform="rotateY(" + ny + "deg)"
y.style.OTransform="rotateY(" + ny + "deg)"
y.style.MozTransform="rotateY(" + ny + "deg)"
if (ny==180 || ny>=360)
	{
	clearInterval(rotYINT)
	if (ny>=360){ny=0}
	}
}
//-->
</script>

HTML部分：
<div id="tpn">
<ul class="prenext">
<li class="pre"><a href="/css3/css3_2dtransform.asp" title="CSS3 2D 转换">CSS3 2D 转换</a></li>
<li class="next"><a href="/css3/css3_transition.asp" title="CSS3 过渡">CSS3 过渡</a></li>
</ul>
</div>