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function getXHR(){
    var xmlHttp = null;
    try {
        // Firefox, Opera 8.0+, Safari
        xmlHttp = new XMLHttpRequest();
    } catch (e) {
        // Internet Explorer
        try {
            xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {

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function lunarLeapMonthOfYear(year){
    var table=[
            0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,
            0x055d2,0x04ae0,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,
            0x095b0,0x14977,0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,
            0x09570,0x052f2,0x04970,0x06566,0x0d4a0,0x0ea50,0x06e95,0x05ad0,0x02b60,
            0x186e3,0x092e0,0x1c8d7,0x0c950,0x0d4a0,0x1d8a6,0x0b550,0x056a0,0x1a5b4,
            0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,0x06ca0,0x0b550,0x15355,0x04da0,
            0x0a5d0,0x14573,0x052d0,0x0a9a8,0x0e950,0x06aa0,0x0aea6,0x0ab50,0x04b60,
            0x0aae4,0x0a570,0x05260,0x0f263,0x0d950,0x05b57,0x056a0,0x096d0,0x04dd5,

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//运行插入页面的javascript代码
function loadScriptString(s){
    var a = document.createElement('script');
    a.type = 'text/javascript';
    var t = document.createTextNode(s);
    try{
        a.appendChild(t);
    }catch(e){
        a.text = s;
    }

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function add() {
  let sum = 0;
  Array.from(arguments).forEach(v => sum += v);
  function f() {
    Array.from(arguments).forEach(v => sum += v);
    return f;
  }
  f.toString = f.valueOf = function() {
    return +sum;
  }

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网页可见区域宽：window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth
网页可见区域高：window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight 

文档高度：document.body.scrollHeight

文档被滚动高度：document.body.scrollTop

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function format(num){
    return (num.toFixed(2) + '').replace(/\d{1,3}(?=(\d{3})+(\.\d*)?$)/g, '$&,');
}

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(function(){
    var _ = {};

    _.now = Date.now || function(){
        return new Date().getTime();
    };

    // Returns a function, that, when invoked, will only be triggered at most once
    // during a given window of time. Normally, the throttled function will run
    // as much as it can, without ever going more than once per `wait` duration;

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var person = {
  name : {
    first : 'ye',
    last : 'lin'
  },
  age : 28,
  gender : 'male',
  birth : {
    year : 1987,
    month : 6,

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var assert = require('assert');
var util = require('util');

function on(thisArg, eventName, fn, isOnce, isPrepend) {
  assert(eventName && typeof fn === 'function', 'Need eventName and callback function');
  if (eventName !== 'newListener' || thisArg.listenerCount('newListener')){
    thisArg.emit('newListener', eventName, fn);
  }
  if (thisArg.fns[eventName]) {
    if (thisArg.fns[eventName].length < thisArg.getMaxListeners()) {

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Object.prototype[Symbol.iterator] = function() {
  var self = this;
  var keys = Object.keys(this);
  var l = keys.length;
  var i = -1;
  return {
    next: function() {
      i++;
      var done = i >= l;
      var key = keys[i];