text: /** @license
   * DHTML Snowstorm! JavaScript-based Snow for web pages
   * --------------------------------------------------------
   * Version 1.43.20111201 (Previous rev: 1.42.20111120)
   * Copyright (c) 2007, Scott Schiller. All rights reserved.
   * Code provided under the BSD License:
   * http://schillmania.com/projects/snowstorm/license.txt
   */
  /*global window, document, navigator, clearInterval, setInterval */
  /*jslint white: false, onevar: true, plusplus: false, undef: true, nomen: true, eqeqeq: true, bitwise: true, regexp: true, newcap: true, immed: true */
  var snowStorm = (function(window, document) {
  // --- common properties ---
      this.autoStart = true; // Whether the snow should start automatically or not.
      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.excludeMobile = true; // Snow is likely to be bad news for mobile phones' CPUs (and batteries.) By default, be nice.
      this.flakeBottom = null; // Integer for Y axis snow limit, 0 or null for "full-screen" snow effect
      this.followMouse = true; // Snow movement can respond to 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.targetElement = null; // element which snow will be appended to (null = document.body) - can be an element ID eg. 'myDiv', or a DOM node reference
      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 does not shift vertically when scrolling. May increase CPU load, disabled by default - if enabled, used only where supported
  // --- less-used bits ---
      this.freezeOnBlur = true; // Only snow when the window is in focus (foreground.) Saves CPU.
      this.flakeLeftOffset = 0; // Left margin/gutter space on edge of container (eg. browser window.) Bump up these values if seeing horizontal scrollbars.
      this.flakeRightOffset = 0; // Right margin/gutter space on edge of container
      this.flakeWidth = 8; // Max pixel width reserved for snow element
      this.flakeHeight = 8; // Max pixel height reserved for snow element
      this.vMaxX = 5; // Maximum X velocity range for snow
      this.vMaxY = 4; // Maximum Y velocity range for snow
      this.zIndex = 0; // CSS stacking order applied to each snowflake
  // --- End of user section ---
      var s = this, storm = this, i,
  // UA sniffing and backCompat rendering mode checks for fixed position, etc.
          isIE = navigator.userAgent.match(/msie/i),
          isIE6 = navigator.userAgent.match(/msie 6/i),
          isWin98 = navigator.appVersion.match(/windows 98/i),
          isMobile = navigator.userAgent.match(/mobile|opera m(ob|in)/i),
          isBackCompatIE = (isIE && document.compatMode === 'BackCompat'),
          noFixed = (isMobile || isBackCompatIE || isIE6),
          screenX = null, screenX2 = null, screenY = null, scrollY = null, vRndX = null, vRndY = null,
          windOffset = 1,
          windMultiplier = 2,
          flakeTypes = 6,
          fixedForEverything = false,
          opacitySupported = (function(){
              try {
                  document.createElement('div').style.opacity = '0.5';
              } catch(e) {
                  return false;
              }
              return true;
          }()),
          didInit = false,
          docFrag = document.createDocumentFragment();
      this.timers = [];
      this.flakes = [];
      this.disabled = false;
      this.active = false;
      this.meltFrameCount = 20;
      this.meltFrames = [];
      this.events = (function() {
          var old = (!window.addEventListener && window.attachEvent), slice = Array.prototype.slice,
              evt = {
                  add: (old?'attachEvent':'addEventListener'),
                  remove: (old?'detachEvent':'removeEventListener')
              };
          function getArgs(oArgs) {
              var args = slice.call(oArgs), len = args.length;
              if (old) {
                  args[1] = 'on' + args[1]; // prefix
                  if (len > 3) {
                      args.pop(); // no capture
                  }
              } else if (len === 3) {
                  args.push(false);
              }
              return args;
          }
          function apply(args, sType) {
              var element = args.shift(),
                  method = [evt[sType]];
              if (old) {
                  element[method](args[0], args[1]);
              } else {
                  element[method].apply(element, args);
              }
          }
          function addEvent() {
              apply(getArgs(arguments), 'add');
          }
          function removeEvent() {
              apply(getArgs(arguments), 'remove');
          }
          return {
              add: addEvent,
              remove: removeEvent
          };
      }());
      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);
      }
      this.randomizeWind = function() {
          var i;
          vRndX = plusMinus(rnd(s.vMaxX,0.2));
          vRndY = rnd(s.vMaxY,0.2);
          if (this.flakes) {
              for (i=0; i<this.flakes.length; i++) {
                  if (this.flakes[i].active) {
                      this.flakes[i].setVelocities();
                  }
              }
          }
      };
      this.scrollHandler = function() {
          var i;
  // "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 (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-16-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
          var i;
          if (!s.disabled) {
              s.disabled = 1;
          } else {
              return false;
          }
          for (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() {
          var i;
          this.freeze();
          for (i=this.flakes.length; i--;) {
              this.flakes[i].o.style.display = 'none';
          }
          s.events.remove(window,'scroll',s.scrollHandler);
          s.events.remove(window,'resize',s.resizeHandler);
          if (s.freezeOnBlur) {
              if (isIE) {
                  s.events.remove(document,'focusout',s.freeze);
                  s.events.remove(document,'focusin',s.resume);
              } else {
                  s.events.remove(window,'blur',s.freeze);
                  s.events.remove(window,'focus',s.resume);
              }
          }
      };
      this.show = function() {
          var i;
          for (i=this.flakes.length; i--;) {
              this.flakes[i].o.style.display = 'block';
          }
      };
      this.SnowFlake = function(parent,type,x,y) {
          var s = this, 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.cursor = 'default';
          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, yDiff;
              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 < -storm.flakeWidth) {
                  s.x = screenX-storm.flakeWidth-1; // flakeWidth;
              }
              s.refresh();
              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.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';
                      s.meltFrame++;
                  } 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, used = 0, waiting = 0, flake = null, i;
          for (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) {
          var i;
          for (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 = (!isWin98?[setInterval(s.snow,s.animationInterval)]:[setInterval(s.snow,s.animationInterval*3),setInterval(s.snow,s.animationInterval)]);
      };
      this.init = function() {
          var i;
          for (i=0; i<s.meltFrameCount; i++) {
              s.meltFrames.push(1-(i/s.meltFrameCount));
          }
          s.randomizeWind();
          s.createSnow(s.flakesMax); // create initial batch
          s.events.add(window,'resize',s.resizeHandler);
          s.events.add(window,'scroll',s.scrollHandler);
          if (s.freezeOnBlur) {
              if (isIE) {
                  s.events.add(document,'focusout',s.freeze);
                  s.events.add(document,'focusin',s.resume);
              } else {
                  s.events.add(window,'blur',s.freeze);
                  s.events.add(window,'focus',s.resume);
              }
          }
          s.resizeHandler();
          s.scrollHandler();
          if (s.followMouse) {
              s.events.add(isIE?document:window,'mousemove',s.mouseMove);
          }
          s.animationInterval = Math.max(20,s.animationInterval);
          s.timerInit();
      };
      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 doDelayedStart() {
          window.setTimeout(function() {
              s.start(true);
          }, 20);
  // event cleanup
          s.events.remove(isIE?document:window,'mousemove',doDelayedStart);
      }
      function doStart() {
          if (!s.excludeMobile || !isMobile) {
              if (s.freezeOnBlur) {
                  s.events.add(isIE?document:window,'mousemove',doDelayedStart);
              } else {
                  doDelayedStart();
              }
          }
  // event cleanup
          s.events.remove(window, 'load', doStart);
      }
  // hooks for starting the snow
      if (s.autoStart) {
          s.events.add(window, 'load', doStart, false);
      }
      return this;
  }(window, document));