снежинки

<script type="text/javascript">
   
  //Configure below to change URL path to the snow image 
  var snowsrc="http://3.bp.blogspot.com/--hEgrJEXAzo/Tt-5f_2SzAI/AAAAAAAAFi8/Uf-VH61UbDY/s400/snow.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://3.bp.blogspot.com/--hEgrJEXAzo/Tt-5f_2SzAI/AAAAAAAAFi8/Uf-VH61UbDY/s400/snow.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://dynamicdrive.com\"><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>
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