var snowmax=30
var snowcolor=new Array("#AAAAAC","#DDDDDF","#c0c0c6","#F0F0F0")
var snowtype=new Array("Arial Narrow","Times")
var snowletter="*"
var sinkspeed=1.4
var snowmaxsize=32
var snowminsize=10

// Set the snowing-zone
// Set 1 for all-over-snowing, set 2 for left-side-snowing 
// Set 3 for center-snowing, set 4 for right-side-snowing
var snowingzone=1

var snow=new Array()
var marginbottom
var marginright
var timer
var i_snow=0
var x_mv=new Array();
var crds=new Array();
var lftrght=new Array();
var browserinfos=navigator.userAgent 
var ie5=document.all&&document.getElementById&&!browserinfos.match(/Opera/)
var ns6=document.getElementById&&!document.all
var opera=browserinfos.match(/Opera/)  
var browserok=ie5||ns6||opera

function randommaker(range) {   
  rand=Math.floor(range*Math.random())
    return rand
}

function initsnow() {
  if (ie5 || opera) {
    marginbottom = document.body.clientHeight
    marginright = document.body.clientWidth
  }
  else if (ns6) {
    marginbottom = window.innerHeight
    marginright = window.innerWidth
  }
  var snowsizerange=snowmaxsize-snowminsize
  for (i=0;i<=snowmax;i++) {
    crds[i] = 0;                      
      lftrght[i] = Math.random()*15;         
      x_mv[i] = 0.03 + Math.random()/10;
    snow[i]=document.getElementById("s"+i)
    snow[i].style.fontFamily=snowtype[randommaker(snowtype.length)]
    snow[i].size=randommaker(snowsizerange)+snowminsize
    snow[i].style.fontSize=snow[i].size
    snow[i].style.color=snowcolor[randommaker(snowcolor.length)]
    snow[i].sink=sinkspeed*snow[i].size/5
    if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)}
    if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)}
    if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4}
    if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2}
    snow[i].posy=randommaker(2*marginbottom-marginbottom-2*snow[i].size)
    snow[i].style.left=snow[i].posx
    snow[i].style.top=snow[i].posy
  }
  movesnow()
}

function movesnow() {
  for (i=0;i<=snowmax;i++) {
    crds[i] += x_mv[i];
    snow[i].posy+=snow[i].sink
    snow[i].style.left=snow[i].posx+lftrght[i]*Math.sin(crds[i]);
    snow[i].style.top=snow[i].posy
    
    if (snow[i].posy>=marginbottom-2*snow[i].size || parseInt(snow[i].style.left)>(marginright-3*lftrght[i])){
      if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)}
      if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)}
      if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4}
      if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2}
      snow[i].posy=0
    }
  }
  var timer=setTimeout("movesnow()",50)
}

for (i=0;i<=snowmax;i++) {
  document.write("<span id='s"+i+"' style='position:absolute;top:-"+snowmaxsize+"'>"+snowletter+"</span>")
}
if (browserok) {
  window.onload=initsnow
}