text: 
  var snowStorm = null;
  
  function SnowStorm() {
  
    // --- PROPERTIES ---
  
    this.flakesMax = 128;           // Limit total amount of snow made (falling + sticking)
    this.flakesMaxActive = 64;      // Limit amount of snow falling at once (less = lower CPU use)
    this.animationInterval = 33;    // Theoretical "miliseconds per frame" measurement. 20 = fast + smooth, but high CPU use. 50 = more conservative, but slower
    this.flakeBottom = null;        // Integer for Y axis snow limit, 0 or null for "full-screen" snow effect
    this.targetElement = null;      // element which snow will be appended to (document body if null/undefined) - can be an element ID string, or a DOM node reference
    this.followMouse = true;        // Snow will change movement with the user's mouse
    this.snowColor = '#fff';        // Don't eat (or use?) yellow snow.
    this.snowCharacter = '&bull;';  // &bull; = bullet, &middot; is square on some systems etc.
    this.snowStick = true;          // Whether or not snow should "stick" at the bottom. When off, will never collect.
    this.useMeltEffect = true;      // When recycling fallen snow (or rarely, when falling), have it "melt" and fade out if browser supports it
    this.useTwinkleEffect = false;  // Allow snow to randomly "flicker" in and out of view while falling
    this.usePositionFixed = false;  // true = snow not affected by window scroll. may increase CPU load, disabled by default - if enabled, used only where supported
  
    // --- less-used bits ---
  
    this.flakeLeftOffset = 0;       // amount to subtract from edges of container
    this.flakeRightOffset = 0;      // amount to subtract from edges of container
    this.flakeWidth = 8;            // max pixel width for snow element
    this.flakeHeight = 8;           // max pixel height for snow element
    this.vMaxX = 5;                 // Maximum X velocity range for snow
    this.vMaxY = 4;                 // Maximum Y velocity range
    this.zIndex = 0;                // CSS stacking order applied to each snowflake
  
    // --- End of user section ---
  
    // jslint global declarations
    /*global window, document, navigator, clearInterval, setInterval */
  
    var addEvent = (typeof(window.attachEvent)=='undefined'?function(o,evtName,evtHandler) {
  	return o.addEventListener(evtName,evtHandler,false);
    }:function(o,evtName,evtHandler) {
  	return o.attachEvent('on'+evtName,evtHandler);
    });
  
    var removeEvent = (typeof(window.attachEvent)=='undefined'?function(o,evtName,evtHandler) {
      return o.removeEventListener(evtName,evtHandler,false);
    }:function(o,evtName,evtHandler) {
  	return o.detachEvent('on'+evtName,evtHandler);
    });
  
    function rnd(n,min) {
      if (isNaN(min)) {
  	  min = 0;
  	}
      return (Math.random()*n)+min;
    }
  
    function plusMinus(n) {
      return (parseInt(rnd(2),10)==1?n*-1:n);
    }
  
    var s = this;
    var storm = this;
    this.timers = [];
    this.flakes = [];
    this.disabled = false;
    this.active = false;
  
    var isIE = navigator.userAgent.match(/msie/i);
    var isIE6 = navigator.userAgent.match(/msie 6/i);
    var isOldIE = (isIE && (isIE6 || navigator.userAgent.match(/msie 5/i)));
    var isWin9X = navigator.appVersion.match(/windows 98/i);
    var isiPhone = navigator.userAgent.match(/iphone/i);
    var isBackCompatIE = (isIE && document.compatMode == 'BackCompat');
    var noFixed = ((isBackCompatIE || isIE6 || isiPhone)?true:false);
    var screenX = null;
    var screenX2 = null;
    var screenY = null;
    var scrollY = null;
    var vRndX = null;
    var vRndY = null;
    var windOffset = 1;
    var windMultiplier = 2;
    var flakeTypes = 6;
    var fixedForEverything = false;
    var opacitySupported = (function(){
      try {
  	  document.createElement('div').style.opacity = '0.5';
      } catch (e) {
  	  return false;
      }
      return true;
    })();
    var docFrag = document.createDocumentFragment();
    if (s.flakeLeftOffset === null) {
  	s.flakeLeftOffset = 0;
    }
    if (s.flakeRightOffset === null) {
  	s.flakeRightOffset = 0;
    }
  
    this.meltFrameCount = 20;
    this.meltFrames = [];
    for (var i=0; i<this.meltFrameCount; i++) {
  	this.meltFrames.push(1-(i/this.meltFrameCount));
    }
  
    this.randomizeWind = function() {
      vRndX = plusMinus(rnd(s.vMaxX,0.2));
      vRndY = rnd(s.vMaxY,0.2);
      if (this.flakes) {
        for (var i=0; i<this.flakes.length; i++) {
          if (this.flakes[i].active) {
            this.flakes[i].setVelocities();
  		}
        }
      }
    };
  
    this.scrollHandler = function() {
      // "attach" snowflakes to bottom of window if no absolute bottom value was given
      scrollY = (s.flakeBottom?0:parseInt(window.scrollY||document.documentElement.scrollTop||document.body.scrollTop,10));
      if (isNaN(scrollY)) {
  	  scrollY = 0; // Netscape 6 scroll fix
  	}
      if (!fixedForEverything && !s.flakeBottom && s.flakes) {
        for (var i=s.flakes.length; i--;) {
          if (s.flakes[i].active === 0) {
  	      s.flakes[i].stick();
  		}
        }
      }
    };
  
    this.resizeHandler = function() {
      if (window.innerWidth || window.innerHeight) {
        screenX = window.innerWidth-(!isIE?16:2)-s.flakeRightOffset;
        screenY = (s.flakeBottom?s.flakeBottom:window.innerHeight);
      } else {
        screenX = (document.documentElement.clientWidth||document.body.clientWidth||document.body.scrollWidth)-(!isIE?8:0)-s.flakeRightOffset;
        screenY = s.flakeBottom?s.flakeBottom:(document.documentElement.clientHeight||document.body.clientHeight||document.body.scrollHeight);
      }
      screenX2 = parseInt(screenX/2,10);
    };
  
    this.resizeHandlerAlt = function() {
      screenX = s.targetElement.offsetLeft+s.targetElement.offsetWidth-s.flakeRightOffset;
      screenY = s.flakeBottom?s.flakeBottom:s.targetElement.offsetTop+s.targetElement.offsetHeight;
      screenX2 = parseInt(screenX/2,10);
    };
  
    this.freeze = function() {
      // pause animation
      if (!s.disabled) {
        s.disabled = 1;
      } else {
        return false;
      }
      for (var i=s.timers.length; i--;) {
        clearInterval(s.timers[i]);
      }
    };
  
    this.resume = function() {
      if (s.disabled) {
         s.disabled = 0;
      } else {
        return false;
      }
      s.timerInit();
    };
  
    this.toggleSnow = function() {
      if (!s.flakes.length) {
        // first run
        s.start();
      } else {
        s.active = !s.active;
        if (s.active) {
          s.show();
          s.resume();
        } else {
          s.stop();
          s.freeze();
        }
      }
    };
  
    this.stop = function() {
      this.freeze();
      for (var i=this.flakes.length; i--;) {
        this.flakes[i].o.style.display = 'none';
      }
      removeEvent(window,'scroll',s.scrollHandler);
      removeEvent(window,'resize',s.resizeHandler);
      if (!isOldIE) {
        removeEvent(window,'blur',s.freeze);
        removeEvent(window,'focus',s.resume);
      }
    };
  
    this.show = function() {
      for (var i=this.flakes.length; i--;) {
        this.flakes[i].o.style.display = 'block';
      }
    };
  
    this.SnowFlake = function(parent,type,x,y) {
      var s = this;
      var storm = parent;
      this.type = type;
      this.x = x||parseInt(rnd(screenX-20),10);
      this.y = (!isNaN(y)?y:-rnd(screenY)-12);
      this.vX = null;
      this.vY = null;
      this.vAmpTypes = [1,1.2,1.4,1.6,1.8]; // "amplification" for vX/vY (based on flake size/type)
      this.vAmp = this.vAmpTypes[this.type];
      this.melting = false;
      this.meltFrameCount = storm.meltFrameCount;
      this.meltFrames = storm.meltFrames;
      this.meltFrame = 0;
      this.twinkleFrame = 0;
      this.active = 1;
      this.fontSize = (10+(this.type/5)*10);
      this.o = document.createElement('div');
      this.o.innerHTML = storm.snowCharacter;
      this.o.style.color = storm.snowColor;
      this.o.style.position = (fixedForEverything?'fixed':'absolute');
      this.o.style.width = storm.flakeWidth+'px';
      this.o.style.height = storm.flakeHeight+'px';
      this.o.style.fontFamily = 'arial,verdana';
      this.o.style.overflow = 'hidden';
      this.o.style.fontWeight = 'normal';
      this.o.style.zIndex = storm.zIndex;
      docFrag.appendChild(this.o);
  
      this.refresh = function() {
  	  if (isNaN(s.x) || isNaN(s.y)) {
  		// safety check
  		return false;
  	  }
        s.o.style.left = s.x+'px';
        s.o.style.top = s.y+'px';
      };
  
      this.stick = function() {
        if (noFixed || (storm.targetElement != document.documentElement && storm.targetElement != document.body)) {
          s.o.style.top = (screenY+scrollY-storm.flakeHeight)+'px';
        } else if (storm.flakeBottom) {
  	    s.o.style.top = storm.flakeBottom+'px';
  	  } else {
          s.o.style.display = 'none';
  	    s.o.style.top = 'auto';
          s.o.style.bottom = '0px';
  	    s.o.style.position = 'fixed';
          s.o.style.display = 'block';
        }
      };
  
      this.vCheck = function() {
        if (s.vX>=0 && s.vX<0.2) {
          s.vX = 0.2;
        } else if (s.vX<0 && s.vX>-0.2) {
          s.vX = -0.2;
        }
        if (s.vY>=0 && s.vY<0.2) {
          s.vY = 0.2;
        }
      };
  
      this.move = function() {
        var vX = s.vX*windOffset;
        s.x += vX;
        s.y += (s.vY*s.vAmp);
        if (s.x >= screenX || screenX-s.x < storm.flakeWidth) { // X-axis scroll check
          s.x = 0;
        } else if (vX < 0 && s.x-storm.flakeLeftOffset<0-storm.flakeWidth) {
          s.x = screenX-storm.flakeWidth-1; // flakeWidth;
        }
        s.refresh();
        var yDiff = screenY+scrollY-s.y;
        if (yDiff<storm.flakeHeight) {
          s.active = 0;
  	    if (storm.snowStick) {
            s.stick();
  	    } else {
  	      s.recycle();
  	    }
        } else {
  	    if (storm.useMeltEffect && s.active && s.type < 3 && !s.melting && Math.random()>0.998) {
  	      // ~1/1000 chance of melting mid-air, with each frame
  	      s.melting = true;
  	      s.melt();
  	      // only incrementally melt one frame
  	      // s.melting = false;
  	    }
  	    if (storm.useTwinkleEffect) {
  		  if (!s.twinkleFrame) {
  			if (Math.random()>0.9) {
  		      s.twinkleFrame = parseInt(Math.random()*20,10);
  		    }
  		  } else {
  			s.twinkleFrame--;
  			s.o.style.visibility = (s.twinkleFrame && s.twinkleFrame%2===0?'hidden':'visible');
  		  }
  	    }
        }
      };
  
      this.animate = function() {
        // main animation loop
        // move, check status, die etc.
        s.move();
      };
  
      this.setVelocities = function() {
        s.vX = vRndX+rnd(storm.vMaxX*0.12,0.1);
        s.vY = vRndY+rnd(storm.vMaxY*0.12,0.1);
      };
  
  	this.setOpacity = function(o,opacity) {
  	  if (!opacitySupported) {
  		return false;
  	  }
  	  o.style.opacity = opacity;
  	};
  
      this.melt = function() {
  	  if (!storm.useMeltEffect || !s.melting) {
  		s.recycle();
  	  } else {
  		if (s.meltFrame < s.meltFrameCount) {
  		  s.meltFrame++;
  		  s.setOpacity(s.o,s.meltFrames[s.meltFrame]);
  		  s.o.style.fontSize = s.fontSize-(s.fontSize*(s.meltFrame/s.meltFrameCount))+'px';
  		  s.o.style.lineHeight = storm.flakeHeight+2+(storm.flakeHeight*0.75*(s.meltFrame/s.meltFrameCount))+'px';
  		} else {
  		  s.recycle();
  		}
  	  }
      };
  
      this.recycle = function() {
        s.o.style.display = 'none';
        s.o.style.position = (fixedForEverything?'fixed':'absolute');
        s.o.style.bottom = 'auto';
        s.setVelocities();
        s.vCheck();
  	  s.meltFrame = 0;
  	  s.melting = false;
  	  s.setOpacity(s.o,1);
  	  s.o.style.padding = '0px';
  	  s.o.style.margin = '0px';
  	  s.o.style.fontSize = s.fontSize+'px';
  	  s.o.style.lineHeight = (storm.flakeHeight+2)+'px';
  	  s.o.style.textAlign = 'center';
  	  s.o.style.verticalAlign = 'baseline';
        s.x = parseInt(rnd(screenX-storm.flakeWidth-20),10);
        s.y = parseInt(rnd(screenY)*-1,10)-storm.flakeHeight;
        s.refresh();
        s.o.style.display = 'block';
        s.active = 1;
      };
  
      this.recycle(); // set up x/y coords etc.
      this.refresh();
  
    };
  
    this.snow = function() {
      var active = 0;
      var used = 0;
      var waiting = 0;
      var flake = null;
      for (var i=s.flakes.length; i--;) {
        if (s.flakes[i].active == 1) {
          s.flakes[i].move();
          active++;
        } else if (s.flakes[i].active === 0) {
          used++;
        } else {
          waiting++;
        }
        if (s.flakes[i].melting) {
  	    s.flakes[i].melt();
  	  }
      }
      if (active<s.flakesMaxActive) {
        flake = s.flakes[parseInt(rnd(s.flakes.length),10)];
        if (flake.active === 0) {
          flake.melting = true;
        }
      }
    };
  
    this.mouseMove = function(e) {
      if (!s.followMouse) {
  	  return true;
  	}
      var x = parseInt(e.clientX,10);
      if (x<screenX2) {
        windOffset = -windMultiplier+(x/screenX2*windMultiplier);
      } else {
        x -= screenX2;
        windOffset = (x/screenX2)*windMultiplier;
      }
    };
  
    this.createSnow = function(limit,allowInactive) {
      for (var i=0; i<limit; i++) {
        s.flakes[s.flakes.length] = new s.SnowFlake(s,parseInt(rnd(flakeTypes),10));
        if (allowInactive || i>s.flakesMaxActive) {
  	    s.flakes[s.flakes.length-1].active = -1;
  	  }
      }
      storm.targetElement.appendChild(docFrag);
    };
  
    this.timerInit = function() {
      s.timers = (!isWin9X?[setInterval(s.snow,s.animationInterval)]:[setInterval(s.snow,s.animationInterval*3),setInterval(s.snow,s.animationInterval)]);
    };
  
    this.init = function() {
      s.randomizeWind();
      s.createSnow(s.flakesMax); // create initial batch
      addEvent(window,'resize',s.resizeHandler);
      addEvent(window,'scroll',s.scrollHandler);
      if (!isOldIE) {
        addEvent(window,'blur',s.freeze);
        addEvent(window,'focus',s.resume);
      }
      s.resizeHandler();
      s.scrollHandler();
      if (s.followMouse) {
        addEvent(document,'mousemove',s.mouseMove);
      }
      s.animationInterval = Math.max(20,s.animationInterval);
      s.timerInit();
    };
  
    var didInit = false;
  
    this.start = function(bFromOnLoad) {
  	if (!didInit) {
  	  didInit = true;
  	} else if (bFromOnLoad) {
  	  // already loaded and running
  	  return true;
  	}
      if (typeof s.targetElement == 'string') {
  	  var targetID = s.targetElement;
        s.targetElement = document.getElementById(targetID);
        if (!s.targetElement) {
  	    throw new Error('Snowstorm: Unable to get targetElement "'+targetID+'"');
  	  }
      }
  	if (!s.targetElement) {
  	  s.targetElement = (!isIE?(document.documentElement?document.documentElement:document.body):document.body);
  	}
      if (s.targetElement != document.documentElement && s.targetElement != document.body) {
  	  s.resizeHandler = s.resizeHandlerAlt; // re-map handler to get element instead of screen dimensions
  	}
      s.resizeHandler(); // get bounding box elements
      s.usePositionFixed = (s.usePositionFixed && !noFixed); // whether or not position:fixed is supported
      fixedForEverything = s.usePositionFixed;
      if (screenX && screenY && !s.disabled) {
        s.init();
        s.active = true;
      }
    };
  
    function doStart() {
  	  s.start(true);
    }
  
    if (document.addEventListener) {
      // safari 3.0.4 doesn't do DOMContentLoaded, maybe others - use a fallback to be safe.
      document.addEventListener('DOMContentLoaded',doStart,false);
      window.addEventListener('load',doStart,false);
    } else {
      addEvent(window,'load',doStart);
    }
  
  }
  
  snowStorm = new SnowStorm();
  