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- Trailing commas are ok
- No reserved words for property names
- NaN, Infinity, undefined : are all constants
- parseInt() defaults to radix 10
- /regexp/ produces new reg ex object every time
- JSON.parse(), JSON.stringify()
- Function.prototype.bind
- String.prototype.trim
- Array.prototype.every, filter, forEach, indexOf, lastIndexOf, map, reduce, reduceRight, some, 
- Date.now()

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/*
 * XComponent
 *
 * 组件描述写在此处
 */
;(function(root){
    'use strict';

    var RootClass = function(option){

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var isMobile = {
    Android: function() {
        return navigator.userAgent.match(/Android/i);
    },
    BlackBerry: function() {
        return navigator.userAgent.match(/BlackBerry/i);
    },
    iOS: function() {
        return navigator.userAgent.match(/iPhone|iPad|iPod/i);
    },

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// 获得url参数
var QueryString = (function() {
  // This function is anonymous, is executed immediately and 
  // the return value is assigned to QueryString!
  var quertString = {};
  var query = window.location.search.substring(1);
  var vars = query.split('&');
  for (var i = 0; i < vars.length; i++) {
    var pair = vars[i].split('=');
    // If first entry with this name

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// bind event handler for a dom list.
XICI.Event.addEvent(gas[i],"click",(function(i){
    return function(){
        var _option = gas[i].getAttribute('node-type');
        var _title = gas[i].innerText || gas[i].getAttribute("title") || gas[i].getAttribute("alt") || "";
        var _option3 = _title + "|" + gas[i].getAttribute("href");
        _gaq.push(['_trackEvent',option1, _option, _option3]);

    }
})(i));

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scrolltop = (((t = document.documentElement) || (t = document.body.parentNode)) typeof t.scrollTop == ‘number’ ? t : document.body).scrollTop

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public static double getDistance(double wd1, double jd1, double wd2, double jd2) {
	double x, y, out;
	double PI = 3.14159265;
	double R = 6.371229 * 1e6;
	
	x = (jd2 - jd1) * PI * R * Math.cos(((wd1 + wd2) / 2) * PI / 180) / 180;
	y = (wd2 - wd1) * PI * R / 180;
	out = Math.hypot(x, y);
	out = out / 1000;
	return out;