1. <!DOCTYPE html>
    2. <html lang="en">
    3. <head>
    4.     <meta charset="UTF-8">
    5.     <title>1-2String-charAt练习</title>
    7.     <script type="text/javascript">
    9.         //charAt:根据位置数，查找出位置数上字符串
    10.         var str = "home.yyy.com/index.jsp?code=xy";
    11.         alert(str.charAt(10));
    13.     </script>
    15. </head>
    16. <body>
    18. </body>
    19. </html>