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Snow falling

Writer: Peter Gehrig
Published: 27 March 2008

Script that let it snow on your screen.
Put this in the body-section.

<body>

<script>
// CREDITS:
// Snowmaker Copyright (c) 2003 Peter Gehrig. All rights reserved.
// Distributed by http://www.webmaster2020.com

// Set the number of snowflakes (more than 30 - 40 not recommended)
var snowmax=35

// Set the colors for the snow. Add as many colors as you like
var snowcolor=new Array("#aaaacc","#ddddFF","#ccccDD")

// Set the fonts, that create the snowflakes. Add as many fonts as you like
var snowtype=new Array("Arial Black","Arial Narrow","Times","Comic Sans MS")

// Set the letter that creates your snowflake (recommended:*)
var snowletter="*"

// Set the speed of sinking (recommended values range from 0.3 to 2)
var sinkspeed=0.8

// Set the maximal-size of your snowflaxes
var snowmaxsize=30

// Set the minimal-size of your snowflaxes
var snowminsize=8

// 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

///////////////////////////////////////////////////////////////////////////
// CONFIGURATION ENDS HERE
///////////////////////////////////////////////////////////////////////////


// Do not edit below this line
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
</script>

 

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