- Prototype 教程
- Prototype - 主页
- Prototype - 简要概述
- Prototype - 有用功能
- Prototype - 实用方法
- Prototype - Element 对象
- Prototype - 处理数字
- Prototype - 处理字符串
- Prototype - 处理数组
- Prototype - 处理 Hash
- Prototype - 基本对象
- Prototype - 模板
- Prototype - 枚举
- Prototype - 事件处理
- Prototype - 表单管理
- Prototype - JSON 支持
- Prototype - AJAX 支持
- Prototype - 表达范围
- Prototype - 周期性执行
- Prototype 有用资源
- Prototype - 快速指南
- Prototype - 有用资源
- Prototype - 讨论
Prototype - Form.Element activate() 方法
此方法将表单控件设为焦点,如果它是文本输入,则选择其内容。
此方法只是设置焦点和选择的快捷方式。因此,以下代码效果相同 -
Form.Element.focus('myelement').select(); is equivalent to: $('myelement').activate();
语法
formElement.activate();
返回值
它返回一个 HTML 元素。
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示例
以下示例将激活 年龄 字段 -
<html> <head> <title>Prototype examples</title> <script type = "text/javascript" src = "/javascript/prototype.js"></script> <script> function showResult() { $('age').activate() } </script> </head> <body> <p>Click the button to see the result.</p> <br /> <form id = "example" action = "#" onsubmit = "return false"> <fieldset><legend>User info</legend> <div> <label for = "username">Username:</label> <input name = "username" id = "username" value = "Sai" type = "text"> </div> <div> <label for = "age">Age:</label> <input name = "age" id = "age" value = "23" size="3" type="text"> </div> <div> <label for = "hobbies">Your hobbies :</label> <select name = "hobbies" id = "hobbies" multiple = "multiple"> <option>coding</option> <option>swimming</option> <option>hiking</option> <option>drawing</option> </select> </div> </fieldset> </form> <br /> <input type = "button" value = "Result" onclick = "showResult();"/> </body> </html>
输出
prototype_form_management.htm
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