键盘事件（在输入框中输入内容后按回车键）

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" lang="en">

   <head>
       <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
       <title>登录直接按回车的效果</title>
       <script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
       <script type="text/javascript">
           $(function() {
               $("input[type='text']:eq(0)").keyup(
                   function() {
                       if(event.keyCode == 13) {
                           $("input[type='password']:eq(0)").focus();
                       }
                   }
               );

               $("input[type='password']:eq(0)").keyup(
                   function() {
                       if(event.keyCode == 13) {
                           $("input[type='button']:eq(0)").click();
                       }
                   }
               );

               $("input[type='button']:eq(0)").click(
                   function() {
                       var result = "";
                       result += "账户是：" + $("input[type='text']:eq(0)").val();
                       result += " ";
                       result += "密码是：" + $("input[type='password']:eq(0)").val();

                       alert(result);
                   }
               );

               //屏蔽默认的浏览器右键菜单
               $(document).bind("contextmenu", function(e) {
                   return false;
               });

               //绑定自定义右键菜单
               $(document).mouseup(
                   function() {
                       console.debug("Button:" + event.button);
                       if(event.button == 2) {
                           $("div")
                               .css("left", event.x)
                               .css("top", event.y)
                               .show();
                       }
                   }
               );
           });
       </script>
   </head>

   <body>
       <table border="0">
           <tr>
               <th>账户：</th>
               <td>
                   <input type="text" />
               </td>
           </tr>
           <tr>
               <th>密码：</th>
               <td>
                   <input type="password" />
               </td>
           </tr>
           <tr>
               <td colspan="2" align="center">
                   <input type="button" value="登录" />
               </td>
           </tr>
       </table>
       <div style="border: solid blue 1px; 200px; height: 400px; display: none; position: absolute;">

       </div>
   </body>

</html>