Tańczące litery w JavaScript

<script language="JavaScript1.2">
 
var msg = "Tańczące litery są Super!";

for (var i=0; i<msg.length; i++){
 document.write("<span id = "dancer" + i + "" style = "position:relative; color:blue; font-family: serif; font-size:xx-large;">" + msg.charAt(i) + "</span>");
}

function init(){
 if (!document.all) return;
 for (i=0; i<msg.length; i++){
  k = Math.round(Math.random() * 30);
  document.all["dancer"+i].style.top = k;
 }
 setTimeout("init(0)", 200);
}

init();
</script>