MxWeiXinPF.Web/obj/Release/Package/PackageTmp/weixin/test/js/parallax.js

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;(function(window, document, undefined) {

  // Strict Mode
  "use strict";

  // Constants
  var NAME = 'Parallax';
  var MAGIC_NUMBER = 30;
  var DEFAULTS = {
    calibrationThreshold: 100,
    calibrationDelay: 500,
    supportDelay: 500,
    calibrateX: false,
    calibrateY: true,
    invertX: true,
    invertY: true,
    limitX: false,
    limitY: false,
    scalarX: 10.0,
    scalarY: 10.0,
    frictionX: 0.1,
    frictionY: 0.1
  };

  function Parallax(element, options) {

    // DOM Context
    this.element = element;
    this.layers = element.getElementsByClassName('layer');

    // Data Extraction
    var data = {
      calibrateX: this.data(this.element, 'calibrate-x'),
      calibrateY: this.data(this.element, 'calibrate-y'),
      invertX: this.data(this.element, 'invert-x'),
      invertY: this.data(this.element, 'invert-y'),
      limitX: this.data(this.element, 'limit-x'),
      limitY: this.data(this.element, 'limit-y'),
      scalarX: this.data(this.element, 'scalar-x'),
      scalarY: this.data(this.element, 'scalar-y'),
      frictionX: this.data(this.element, 'friction-x'),
      frictionY: this.data(this.element, 'friction-y')
    };

    // Delete Null Data Values
    for (var key in data) {
      if (data[key] === null) delete data[key];
    }

    // Compose Settings Object
    this.extend(this, DEFAULTS, options, data);

    // States
    this.calibrationTimer = null;
    this.calibrationFlag = true;
    this.enabled = false;
    this.depths = [];
    this.raf = null;

    // Offset