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<!---snow effect --->
<SCRIPT type="text/javascript">
/*
Classic Snow Fall - Java Script
*/

// 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","#f3f3f3","#f0ffff")

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

// 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=0.6

// Set the maximum-size of your snowflakes
var snowmaxsize=30

// Set the minimal-size of your snowflakes
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.scrollHeight
                marginright = document.body.clientWidth-15
        }
        else if (ns6) {
                marginbottom = document.body.scrollHeight
                marginright = window.innerWidth-15
        }
        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+'px';
                snow[i].style.color=snowcolor[randommaker(snowcolor.length)]
                snow[i].style.zIndex=1000
                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+'px';
                snow[i].style.top=snow[i].posy+'px';
        }
        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])+'px';
                snow[i].style.top=snow[i].posy+'px';

                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>")
}

var canvas = document.querySelector('.snow'),
    ctx = canvas.getContext('2d'),
    windowW = window.innerWidth,
    windowH = window.innerHeight,
    numFlakes = 200,
    flakes = [];

function Flake(x, y) {
  var maxWeight = 5,
      maxSpeed = 3;
 
  this.x = x;
  this.y = y;
  this.r = randomBetween(0, 1);
  this.a = randomBetween(0, Math.PI);
  this.aStep = 0.01;

 
  this.weight = randomBetween(2, maxWeight);
  this.alpha = (this.weight / maxWeight);
  this.speed = (this.weight / maxWeight) * maxSpeed;
 
  this.update = function() {
    this.x += Math.cos(this.a) * this.r;
    this.a += this.aStep;
    
    this.y += this.speed;
  }
 
}

function init() {
  var i = numFlakes,
      flake,
      x,
      y;
 
  while (i--) {
    x = randomBetween(0, windowW, true);
    y = randomBetween(0, windowH, true);
    
    
    flake = new Flake(x, y);
    flakes.push(flake);
  }
 
  scaleCanvas();
  loop(); 
}

function scaleCanvas() {
  canvas.width = windowW;
  canvas.height = windowH;
}

function loop() {
  var i = flakes.length,
      z,
      dist,
      flakeA,
      flakeB;
 
  // clear canvas
  ctx.save();
  ctx.setTransform(1, 0, 0, 1, 0, 0);
  ctx.clearRect(0, 0, windowW, windowH);
  ctx.restore();
 
  // loop of hell
  while (i--) {
    
    flakeA = flakes[i];
    flakeA.update();
    

    /*for (z = 0; z < flakes.length; z++) {
      flakeB = flakes[z];
      if (flakeA !== flakeB && distanceBetween(flakeA, flakeB) < 150) {         
        ctx.beginPath();
        ctx.moveTo(flakeA.x, flakeA.y);
        ctx.lineTo(flakeB.x, flakeB.y);
        ctx.strokeStyle = '#444444';
        ctx.stroke();
        ctx.closePath();
      }
    }*/

    
    ctx.beginPath();
    ctx.arc(flakeA.x, flakeA.y, flakeA.weight, 0, 2 * Math.PI, false);
    ctx.fillStyle = 'rgba(255, 255, 255, ' + flakeA.alpha + ')';
    ctx.fill();
    
    if (flakeA.y >= windowH) {
      flakeA.y = -flakeA.weight;
    } 
  }
 
  requestAnimationFrame(loop);
}

function randomBetween(min, max, round) {
  var num = Math.random() * (max - min + 1) + min;

  if (round) {
    return Math.floor(num);
  } else {
    return num;
  }
}

function distanceBetween(vector1, vector2) {
  var dx = vector2.x - vector1.x,
      dy = vector2.y - vector1.y;

  return Math.sqrt(dx*dx + dy*dy);
}

init();