// $Id: progress.js,v 1.27 2010/09/09 21:05:11 dries Exp $
(function ($) {

/**
 * A progressbar object. Initialized with the given id. Must be inserted into
 * the DOM afterwards through progressBar.element.
 *
 * method is the function which will perform the HTTP request to get the
 * progress bar state. Either "GET" or "POST".
 *
 * e.g. pb = new progressBar('myProgressBar');
 *      some_element.appendChild(pb.element);
 */
Drupal.progressBar = function (id, updateCallback, method, errorCallback) {
  var pb = this;
  this.id = id;
  this.method = method || 'GET';
  this.updateCallback = updateCallback;
  this.errorCallback = errorCallback;

  // The WAI-ARIA setting aria-live="polite" will announce changes after users
  // have completed their current activity and not interrupt the screen reader.
  this.element = $('<div class="progress" aria-live="polite"></div>').attr('id', id);
  this.element.html('<div class="bar"><div class="filled"></div></div>' +
                    '<div class="percentage"></div>' +
                    '<div class="message">&nbsp;</div>');
};

/**
 * Set the percentage and status message for the progressbar.
 */
Drupal.progressBar.prototype.setProgress = function (percentage, message) {
  if (percentage >= 0 && percentage <= 100) {
    $('div.filled', this.element).css('width', percentage + '%');
    $('div.percentage', this.element).html(percentage + '%');
  }
  $('div.message', this.element).html(message);
  if (this.updateCallback) {
    this.updateCallback(percentage, message, this);
  }
};

/**
 * Start monitoring progress via Ajax.
 */
Drupal.progressBar.prototype.startMonitoring = function (uri, delay) {
  this.delay = delay;
  this.uri = uri;
  this.sendPing();
};

/**
 * Stop monitoring progress via Ajax.
 */
Drupal.progressBar.prototype.stopMonitoring = function () {
  clearTimeout(this.timer);
  // This allows monitoring to be stopped from within the callback.
  this.uri = null;
};

/**
 * Request progress data from server.
 */
Drupal.progressBar.prototype.sendPing = function () {
  if (this.timer) {
    clearTimeout(this.timer);
  }
  if (this.uri) {
    var pb = this;
    // When doing a post request, you need non-null data. Otherwise a
    // HTTP 411 or HTTP 406 (with Apache mod_security) error may result.
    $.ajax({
      type: this.method,
      url: this.uri,
      data: '',
      dataType: 'json',
      success: function (progress) {
        // Display errors.
        if (progress.status == 0) {
          pb.displayError(progress.data);
          return;
        }
        // Update display.
        pb.setProgress(progress.percentage, progress.message);
        // Schedule next timer.
        pb.timer = setTimeout(function () { pb.sendPing(); }, pb.delay);
      },
      error: function (xmlhttp) {
        pb.displayError(Drupal.ajaxError(xmlhttp, pb.uri));
      }
    });
  }
};

/**
 * Display errors on the page.
 */
Drupal.progressBar.prototype.displayError = function (string) {
  var error = $('<div class="messages error"></div>').html(string);
  $(this.element).before(error).hide();

  if (this.errorCallback) {
    this.errorCallback(this);
  }
};

})(jQuery);
;
Drupal.locale = { 'pluralFormula': function ($n) { return Number(($n!=1)); }, 'strings': {"An AJAX HTTP error occurred.":"\u53d1\u751f\u4e00\u4e2aAJAX HTTP\u9519\u8bef\u3002","HTTP Result Code: !status":"HTTP\u8fd4\u56de\u4ee3\u7801\uff1a!status","An AJAX HTTP request terminated abnormally.":"\u4e00\u4e2aAJAX HTTP\u8bf7\u6c42\u5f02\u5e38\u7ec8\u6b62\u3002","Debugging information follows.":"\u8c03\u8bd5\u4fe1\u606f\u5982\u4e0b\u3002","Path: !uri":"\u8def\u5f84\uff1a!uri","StatusText: !statusText":"\u72b6\u6001\u6587\u672c: !statusText","ResponseText: !responseText":"\u54cd\u5e94\u6587\u672c\uff1a !responseText","ReadyState: !readyState":"\u51c6\u5907\u72b6\u6001\uff1a !readyState","Loading":"\u6b63\u5728\u52a0\u8f7d","(active tab)":"\uff08\u6d3b\u52a8\u6807\u7b7e\uff09","Hide":"\u9690\u85cf","Show":"\u663e\u793a","Re-order rows by numerical weight instead of dragging.":"\u4e0d\u7528\u62d6\u653e\u64cd\u4f5c\uff0c\u800c\u7528\u6570\u5b57\u6743\u91cd\u65b9\u5f0f\u91cd\u65b0\u5bf9\u884c\u6392\u5e8f\u3002","Show row weights":"\u663e\u793a\u884c\u7684\u6743\u91cd","Hide row weights":"\u9690\u85cf\u884c\u7684\u6743\u91cd","Drag to re-order":"\u62d6\u653e\u91cd\u65b0\u6392\u5e8f","Changes made in this table will not be saved until the form is submitted.":"\u5728\u6b64\u8868\u683c\u4e2d\u7684\u4fee\u6539\u53ea\u6709\u5728\u6574\u4e2a\u8868\u5355\u63d0\u4ea4\u540e\u624d\u4f1a\u88ab\u4fdd\u5b58\u3002","Enabled":"\u542f\u7528","Hide shortcuts":"\u9690\u85cf\u5feb\u6377\u952e","Disabled":"\u7981\u7528","Edit":"\u7f16\u8f91","none":"\u65e0","Configure":"\u914d\u7f6e","Done":"\u5b8c\u6210","Select all rows in this table":"\u9009\u62e9\u6b64\u8868\u4e2d\u6240\u6709\u7684\u884c","Deselect all rows in this table":"\u53d6\u6d88\u9009\u62e9\u6b64\u8868\u4e2d\u6240\u6709\u7684\u884c","Not published":"\u672a\u53d1\u8868","Please wait...":"\u8bf7\u7a0d\u7b49...","By @name on @date":"By @name \u5728 @date","By @name":"\u6309 @name","Not in menu":"\u4e0d\u5728\u83dc\u5355\u4e2d","Alias: @alias":"\u522b\u540d\uff1a@alias","No alias":"\u65e0\u522b\u540d","New revision":"\u65b0\u5efa\u4fee\u8ba2\u7248\u672c","The changes to these blocks will not be saved until the \u003cem\u003eSave blocks\u003c\/em\u003e button is clicked.":"\u8fd9\u4e9b\u533a\u5757\u7684\u53d8\u66f4\u4e0d\u4f1a\u88ab\u50a8\u5b58\u8d77\u6765\uff0c\u9664\u975e\u60a8\u6309\u4e0b\u003cem\u003e\u50a8\u5b58\u533a\u5757\u003c\/em\u003e\u7684\u6309\u94ae\u3002","Show shortcuts":"\u663e\u793a\u5feb\u6377\u65b9\u5f0f","This permission is inherited from the authenticated user role.":"\u6b64\u6743\u9650\u7ee7\u627f\u81ea\u6ce8\u518c\u7528\u6237\u89d2\u8272\u3002","No revision":"\u6ca1\u6709\u4fee\u8ba2\u7248\u672c","@number comments per page":"\u6bcf\u9875 @number \u6761\u8bc4\u8bba","Requires a title":"\u9700\u8981\u6807\u9898","Not restricted":"\u672a\u53d7\u9650\u5236","Not customizable":"\u4e0d\u53ef\u81ea\u5b9a\u4e49\u7684","Restricted to certain pages":"\u9650\u5236\u5230\u7279\u5b9a\u7684\u533a\u5757","The block cannot be placed in this region.":"\u8fd9\u4e2a\u533a\u5757\u4e0d\u80fd\u653e\u624d\u8fd9\u4e2a\u533a\u57df\u4e2d\u3002","Customize dashboard":"\u81ea\u5b9a\u4e49\u9762\u677f","Hide summary":"\u9690\u85cf\u6458\u8981","Edit summary":"\u7f16\u8f91\u6458\u8981","Don't display post information":"\u4e0d\u8981\u663e\u793a\u53d1\u5e03\u4fe1\u606f\u3002","@title dialog":"@title\u5bf9\u8bdd\u6846","The selected file %filename cannot be uploaded. Only files with the following extensions are allowed: %extensions.":"\u9009\u62e9\u7684\u6587\u4ef6%filename\u65e0\u6cd5\u4e0a\u4f20\u3002\u53ea\u6709\u4ee5\u4e0b\u7c7b\u578b\u7684\u6587\u4ef6\u88ab\u5141\u8bb8\uff1a%extensions\u3002","Autocomplete popup":"\u81ea\u52a8\u5b8c\u6210\u7684\u5f39\u51fa\u7a97\u53e3","Searching for matches...":"\u6b63\u5728\u67e5\u627e\u5339\u914d\u9879..."} };;
/** @license
 * DHTML Snowstorm! JavaScript-based Snow for web pages
 * --------------------------------------------------------
 * Version 1.42.20111120 (Previous rev: 1.41.20101113)
 * 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.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/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-(!isIE?16:16)-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.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.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, 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
  s.events.add(window, 'load', doStart, false);

  return this;

}(window, document));;