基于JS代码实现图片在页面中旋转效果

<script language="javascript"> 
var x1=200; 
var x2=200; 
var timer;
var r=60;
var i = 0; 
function eddyphoto(i) { 
var ob=document.all("divround");
ob.style.posTop = rMath.sin((iMath.PI)/180)+x1; 
ob.style.posLeft = rMath.cos((iMath.PI)/180)+x2; 
i=i+1;
if (r>100){
window.clearTimeout(timer);
}
else{
if (i > 360){
i = 0;r = r + 1;
}
timer=setTimeout("eddyphoto("+i+")",10);
}
}
eddyphoto(0);
</script> 

<div id="divround" style="width:50pt; :198.75pt; left:256.5pt; position:absolute; z-index:0">
<img src="temp.jpg">
</div>