示例：<script type="text/javascript"> var myarr = new Array(3); myarr[0] = "I"; myarr[1] = "Love"; myarr[2] = "JS"; document.write(myarr.join()); </script>结果：I,Love,JS
js 指定分隔符连接数组元素join()
原文：https://www.cnblogs.com/kingsonfu/p/9938734.html
