JavaScript循环遍历JSON对象获取所有Key和Value的方法

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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>

<body>
<script>
var dxy={
//Page地址 
  pageUrl : { 
    menu      :  "loadPage.htm?url=/collect/menu.page",     // 进入菜单页面 
    guangfaPage   :  "loadPage.htm?url=/collect/menu.page",     // 进入广发信息收集页面 
    pinganPage   :  "loadPage.htm?url=/collect/menu.page",     // 进入平安信息收集页面 
    nuonuoPage   :  "loadPage.htm?url=/collect/menu.page",     // 进入诺诺信息收集页面 
    youbangPage   :  "loadPage.htm?url=/collect/menu.page",     // 进入友邦信息收集页面 
    inputMobileNo : "loadPage.htm?url=/collect/inputMobileNo.page",  // 进入输入手机号页面 
    readIdCard   : "loadPage.htm?url=/collect/readIdCard.page",    // 进入读取身份证页面 
    member     : "loadPage.htm?url=/collect/member.page",      // 进入输入会员卡号页面 
    bankCard    : "loadPage.htm?url=/collect/bankCard.page",     // 进入插入银行卡页面 
    url      : "loadPage.htm?url=/collect/url.page"        // 进入跳转url页面 
  } 
}
for(var key in dxy.pageUrl){ 
  alert(key+" : "+dxy.pageUrl[key]); 
}
</script>
</body>
</html>

var obj = { 
 "a": 1, 
 "b": 2, 
 "c": 3 
}; 
 
for (var prop in obj) { 
 if (obj.hasOwnProperty(prop)) {  
 // or if (Object.prototype.hasOwnProperty.call(obj,prop)) for safety... 
  alert("prop: " + prop + " value: " + obj[prop]) 
 } 
} 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>

<body>
<script>



var obj = { 
"http://www.2016idc.com/cdn.html" : "◆◆◆◆◆高防免备案CDN◆◆◆◆◆",
"http://www.zoneidc.com/" : "1G香港云49元/美国云49元/韩国云89元",
"http://click.aliyun.com/m/15321/" : "30余款阿里云产品免费6个月",
"http://www.kaivps.com/cloud.html": "◆好优云◆抗攻击◆无视CC◆免备◆稳定◆",

"http://www.laoyuming.com/new.html" : "【15000个备案老域名】每天更新400个",
"http://seo.whbtsj.com/" : "★百度快速上首页，无效果不收费★",
"http://www.osssnet.com/" : "◆50M香港/美国/日本服务器380免备案◆",
"http://www.cuwww.com" : "█香港服务器租用百兆带宽1300起█",

"http://www.guowaidiaocha.com/" : "★国外调查 月赚两万，一对一教学带你★",
"http://www.enkj.com/idc/" : "【亿恩】DELL品牌服务器，月付799元起",
"http://www.hkcn2.com/51.htm" : "**香港高防10m大带宽独服，低至999元**",
"https://www.zllyun.com/cloud.shtml" : "知了云,OpenStack云服务器◆5折优惠◆",

"http://www.8000idc.com" : "— — 香港云33元美国云39元快云21元 — —",
"https://www.50vm.com/" : "4核独服199/16核独服360|创梦网络",
"https://cloud.tencent.com/act/campus?fromSource=gwzcw.846004.846004.846004" : "腾讯云拼团福利 1核2G云服务器10元/月",
"http://www.zitian.cn/" : "中原地区核心数据中心，月付299元起",
"http://www.7yc.com/rent.html" : "██云彩网络██100G防服务器450元",

"http://www.dsx.top/" : "产品发布、创业开店、需求任务找大师兄",
"http://www.gwidc.com/rent/home/index.html" : "港湾网络-徐州百独16核16G 800/月~",
"http://www.ssf.cc/" : "免备vps20/百独799/双线350/45互联",
"http://www.ushk.net/server.html" : "██美港数据██高端香港服务器租用",

"http://vps.zzidc.com/tongji/jb51w.html" : "★☆云服务器5折，天天抽红包抵扣☆★",
"http://www.ku86.com/" : "百兆 12核24线程 16G内存 2T 999/月",
"http://www.xiaozhiyun.com/2016/" : "韩国\香港\美国站群服务器 巨牛网络",

"http://www.wsisp.net/sale/20170518/?indexjb" : "█▇▆5M独享云主机599/年▆▇█",
"http://www.qy.com.cn/" : "群英云服务器送10M带宽30G防御,49元起",
"http://www.tuidc.com/" : "服务器租用/托管-域名空间/认准腾佑科技",
"http://www.jjidc.com/" : "九九数据 — 工信部认可正规资质IDC接入商",

"https://www.95idc.com" : "95IDC█香港沙田CN2服务器 599/月",
"http://www.33ip.com/" : "枫信科技-江苏双线10M保证-399/元",
"https://youhui.jb51.net/" : "★★领取天猫淘宝最高2018元红包★★",
"http://www.pdidc.com/" : "浦东数据中心上海电信4星云主机30元/月起",

"http://www.139w.com/" : "鼎点网络百兆独享服务器仅需999元",
"http://www.360jq.com/hkshuang.htm" : "[香港双高防]无视CC★DDOS/堪比广东！",
"http://www.cyidc.cc/" : "畅游网络 百独服务器 包跑满 998元",
"http://www.wdw6.com/" : "服务器租用 199元起"
}; 
var jbstr="";
var i=0;
var color="blue";
for (var jbkey in obj) {
 if (obj.hasOwnProperty(jbkey)) {	 
 // or if (Object.prototype.hasOwnProperty.call(obj,prop)) for safety... 
 //alert(i);
  if(i % 4 == 0){
		if(color=="blue"){
			color="red";
		}else{
			color="blue";
		}
 	}
	jbstr+='<li><a href="'+jbkey+'" rel="external nofollow" target="_blank"><span style="color:'+color+';">'+obj[jbkey]+'</span></a></li>';
i++
 }
} 
document.write(jbstr);
</script>
</body>
</html>

var msg = ""; 
for(var key in Pin) { 
  for(var i in Pin[key]){ 
  msg+=i+": "+Pin[key][i]+"\n"; 
  } 
} 
alert(msg); 

markers = [];
    markers[2]=3;
    markers[3]=7;
    for(var key in markers){
      console.log( key )
      console.log( markers[key] )
    }