《SCRIPT》
//Snow - http://www.btinternet.com/~kurt.grigg/javascript
if ((document.getElementById) &&
  window.addEventListener || window.attachEvent){
(function(){
//Configure here.
var num = 30; //Number of flakes
  var timer = 30; //setTimeout speed. Varies on different comps
  var enableinNS6 = 1 //Enable script in NS6/Mozilla? Snow animation could be slow in those browsers. (1=yes, 0=no).
//End.
var y = [];
  var x = [];
  var fall = [];
  var theFlakes = [];
  var sfs = [];
  var step = [];
  var currStep = [];
  var h,w,r;
  var d = document;
  var pix = "px";
  var domWw = (typeof window.innerWidth == "number");
  var domSy = (typeof window.pageYOffset == "number");
  var idx = d.getElementsByTagName('div').length;
if (d.documentElement.style &&
  typeof d.documentElement.style.MozOpacity == "string")
  num = 12;
for (i = 0; i 《 num; i++){
  sfs[i] = Math.round(1 + Math.random() * 1);
document.write('《div id="flake'+(idx+i)+'" style="position:absolute;top:0px;left:0px;width:'
  +sfs[i]+'px;height:'+sfs[i]+'px;background-color:#ffffff;font-size:'+sfs[i]+'px"》《\/div》');
currStep[i] = 0;
  fall[i] = (sfs[i] == 1)?
  Math.round(2 + Math.random() * 2): Math.round(3 + Math.random() * 2);
  step[i] = (sfs[i] == 1)?
  0.05 + Math.random() * 0.1 : 0.05 + Math.random() * 0.05 ;
  }
if (domWw) r = window;
  else{
  if (d.documentElement &&
  typeof d.documentElement.clientWidth == "number" &&
  d.documentElement.clientWidth != 0)
  r = d.documentElement;
  else{
  if (d.body &&
  typeof d.body.clientWidth == "number")
  r = d.body;
  }
  }
function winsize(){
  var oh,sy,ow,sx,rh,rw;
  if (domWw){
  if (d.documentElement && d.defaultView &&
  typeof d.defaultView.scrollMaxY == "number"){
  oh = d.documentElement.offsetHeight;
  sy = d.defaultView.scrollMaxY;
  ow = d.documentElement.offsetWidth;
  sx = d.defaultView.scrollMaxX;
  rh = oh-sy;
  rw = ow-sx;
  }
  else{
  rh = r.innerHeight;
  rw = r.innerWidth;
  }
  h = rh - 2;
  w = rw - 2;
  }
  else{
  h = r.clientHeight - 2;
  w = r.clientWidth - 2;
  }
  }
function scrl(yx){
  var y,x;
  if (domSy){
  y = r.pageYOffset;
  x = r.pageXOffset;
  }
  else{
  y = r.scrollTop;
  x = r.scrollLeft;
  }
  return (yx == 0)?y:x;
  }
function snow(){
  var dy,dx;
for (i = 0; i 《 num; i++){
  dy = fall[i];
  dx = fall[i] * Math.cos(currStep[i]);
 y[i]+=dy;
  x[i]+=dx;
 if (x[i] 》= w || y[i] 》= h){
  y[i] = -10;
  x[i] = Math.round(Math.random() * w);
  fall[i] = (sfs[i] == 1)?
  Math.round(2 + Math.random() * 2): Math.round(3 + Math.random() * 2);
  step[i] = (sfs[i] == 1)?
  0.05 + Math.random() * 0.1 : 0.05 + Math.random() * 0.05 ;
  }
 
  theFlakes[i].top = y[i] + scrl(0) + pix;
  theFlakes[i].left = x[i] + scrl(1) + pix;
 currStep[i]+=step[i];
  }
  setTimeout(snow,timer);
  }
function init(){
  winsize();
  for (i = 0; i 《 num; i++){
  theFlakes[i] = document.getElementById("flake"+(idx+i)).style;
  y[i] = Math.round(Math.random()*h);
  x[i] = Math.round(Math.random()*w);
  }
  snow();
  }
if (window.addEventListener){
  window.addEventListener("resize",winsize,false);
  window.addEventListener("load",init,false);
  }
  else if (window.attachEvent){
  window.attachEvent("onresize",winsize);
  window.attachEvent("onload",init);
  }
})();
  }//End.
《/SCRIPT》