摘要：
javascript代码如下 <script type="text/javascript"> var arr = [1,2,3,4,5,6,5,4,3,7,8,9,8,7,6,5,4,6,7]; //字符串长度 var iLen = arr.length; //外层循环控制每次取的下标为i的元素 f 阅读全文
摘要：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv 阅读全文