标签：return var sina sts array func 一个 join str
function IsInArray(arr,val){ var testStr=‘,‘+arr.join(",")+","; return testStr.indexOf(","+val+",")!=-1; }
js判断某个元素是否属于一个数组
原文地址：https://www.cnblogs.com/linfblog/p/12150812.html
