检测是否是数组：
ES3检测是否是数组：Object.prototype.toString.call(要判断的变量)ES5检测是否是数组：Array.isArray()
数组转字符串：join("分隔符")
字符串转换数组：split("分隔符")
js对象转换成js字符串：stringify()
js字符串转换成js对象：parse()
函数表达式与函数声明
if(window.location.toString().indexOf('pref=padindex') !=-1) { }else{if(/AppleWebKit.*Mobile/i.test(navigator.userAgent) ||/\(Android.*Mobile.+\).+Gecko.+Firefox/i.test(navigator.userAgent) || (/MIDP|SymbianOS|NOKIA|SAMSUNG|LG|NEC|TCL|Alcatel|BIRD|DBTEL|Dopod|PHILIPS|HAIER|LENOVO|MOT-|Nokia|SonyEricsson|SIE-|Amoi|ZTE/.test(navigator.userAgent))) {if(window.location.href.indexOf("?mobile")<0){try{if(/Android|Windows Phone|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent)) {window.location.href="https://xw.qq.com?f=qqcom"; }elseif(/iPad/i.test(navigator.userAgent)) {//window.location.href="http://www.qq.com/pad/"}else{window.location.href="http://xw.qq.com/simple/s/index/"} }catch(e) {} } } }
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