v:oval id="circle" style="position:relative;width:100;height:80;" onmouseover="move()" fillcolor=red />
script>
var canmove=false;
function move()
{
 circle.style.position="absolute";
 canmove=true;
 document.onmousemove=new Function("if(canmove){circle.style.posLeft=event.x;circle.style.posTop=event.y;}");
}
document.onclick=new Function("canmove=false");
/script>