Скрипт падающего изображение на сайте

<script type="text/javascript">
  //Configure below to change URL path to the snow image
  var snowsrc="http://zornet.ru/Aben/Gsa/2.gif"
  // Configure below to change number of snow to render
  var no = 15;
  // Configure whether snow should disappear after x seconds (0=never):
  var hidesnowtime = 0;
  // Configure how much snow should drop down before fading ("windowheight" or "pageheight")
  var snowdistance = "pageheight";
///////////Stop Config//////////////////////////////////
  var ie4up = (document.all) ? 1 : 0;
  var ns6up = (document.getElementById&&!document.all) ? 1 : 0;
  function iecompattest(){
  return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
  }
  var dx, xp, yp; // coordinate and position variables
  var am, stx, sty; // amplitude and step variables
  var i, doc_width = 800, doc_height = 600;
  if (ns6up) {
  doc_width = self.innerWidth;
  doc_height = self.innerHeight;
  } else if (ie4up) {
  doc_width = iecompattest().clientWidth;
  doc_height = iecompattest().clientHeight;
  }
  dx = new Array();
  xp = new Array();
  yp = new Array();
  am = new Array();
  stx = new Array();
  sty = new Array();
  snowsrc=(snowsrc.indexOf("dynamicdrive.com")!=-1)? "http://zornet.ru/Aben/Gsa/2.gif" : snowsrc
  for (i = 0; i < no; ++ i) {
  dx[i] = 0; // set coordinate variables
  xp[i] = Math.random()*(doc_width-50); // set position variables
  yp[i] = Math.random()*doc_height;
  am[i] = Math.random()*20; // set amplitude variables
  stx[i] = 0.02 + Math.random()/10; // set step variables
  sty[i] = 0.7 + Math.random(); // set step variables
  if (ie4up||ns6up) {
  if (i == 0) {
  document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><a href=\"http://delaisait.ucoz.ru\"><img src='"+snowsrc+"' border=\"0\"><\/a><\/div>");
  } else {
  document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><img src='"+snowsrc+"' border=\"0\"><\/div>");
  }
  }
  }
  function snowIE_NS6() { // IE and NS6 main animation function
  doc_width = ns6up?window.innerWidth-10 : iecompattest().clientWidth-10;
  doc_height=(window.innerHeight && snowdistance=="windowheight")? window.innerHeight : (ie4up && snowdistance=="windowheight")? iecompattest().clientHeight : (ie4up && !window.opera && snowdistance=="pageheight")? iecompattest().scrollHeight : iecompattest().offsetHeight;
  for (i = 0; i < no; ++ i) { // iterate for every dot
  yp[i] += sty[i];
  if (yp[i] > doc_height-50) {
  xp[i] = Math.random()*(doc_width-am[i]-30);
  yp[i] = 0;
  stx[i] = 0.02 + Math.random()/10;
  sty[i] = 0.7 + Math.random();
  }
  dx[i] += stx[i];
  document.getElementById("dot"+i).style.top=yp[i]+"px";
  document.getElementById("dot"+i).style.left=xp[i] + am[i]*Math.sin(dx[i])+"px";
  }
  snowtimer=setTimeout("snowIE_NS6()", 10);
  }
  function hidesnow(){
  if (window.snowtimer) clearTimeout(snowtimer)
  for (i=0; i<no; i++) document.getElementById("dot"+i).style.visibility="hidden"
  }
if (ie4up||ns6up){
  snowIE_NS6();
  if (hidesnowtime>0)
  setTimeout("hidesnow()", hidesnowtime*1000)
  }
</script>