字符串:var s = "1,2,3,4,5,"目标:删除最后一个 ","方法: s=s.substring(0,s.length-1);字符串:var s2 = "img/upload/123.jpg"目标:获取文件名(不包含后缀名)方法: s2=s2.substring(s2.lastIndexOf('/')+1, s2.lastIndexOf('.')); 原文链接:http://blog.163.com/li_crane/blog/static/19502097201011281835796/ 学习交流群:364976091