Code
<script language="JavaScript">
<!--
var r = 75;
var xoff = 450;
var yoff = 270;
var pi = Math.PI;
var inc = pi / 40;
var pos=0;
function move() {
pos += inc;
if (pos>= 2*pi ) {pos=0 }
if (pos<= pi) {obj.zIndex =5; }
if (pos>= pi) {obj.zIndex =0; }
obj.left = (r * Math.cos(pos)) + xoff-5
obj.top = (r *0.15* Math.sin(pos)) + yoff-5;
setTimeout("move()", 30);
}
-->
</script>
</head>
<body>
<div id="obj" style="position:absolute; left:400px; top:10px; width:10px; height:31px"><img src="../img/ball2.gif" width=10 height=10 border=0></div><div style="position:absolute; left:430px; top:248px; width:10px; height:31px"><img src="../img/heart.gif" width="33" height="30" border=0></div>
<script language="JavaScript">
<!--
var NN = (navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 4);
var obj = (NN) ? document.obj : document.all.obj.style;
move();
-->
</script>