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Jun 24, 2016 am 11:33 AM

HTML下拉列表框

讲解：

1、value：

2、selected="selected"：

设置selected="selected"属性，则该选项就被默认选中。

下拉列表框进行多选：

下拉列表也可以进行多选操作，在

HTML提交按钮

语法：

<input   <strong>type="submit"</strong>   value="提交">

type：只有当type值设置为submit时，按钮才有提交作用

value：按钮上显示的文字

HTML重置按钮

语法：

type="reset" value="重置">

type：只有当type值设置为reset时，按钮才有重置作用

value：按钮上显示的文字

HTML Form表单中的lable标签

label标签不会向用户呈现任何特殊效果，它的作用是为鼠标用户改进了可用性。如果你在 label 标签内点击文本，就会触发此控件。就是说，当用户单击选中该label标签时，浏览器就会自动将焦点转到和标签相关的表单控件上（就自动选中和该label标签相关连的表单控件上）。

语法：

<label for="控件id名称">

注意：标签的 for 属性中的值应当与相关控件的 id 属性值一定要相同。

例子：

<body>    <form>      你对什么运动感兴趣：<br/>      <label for="Run">跑步</label>      <input type="checkbox" name="run" id="run" />      <br />      <label for="mountaineering">登山</label>      <input type="checkbox" name="mountaineering" id="mountaineering" />      <br />      <label for="basketball">篮球</label>      <input type="checkbox" id="basketball" placeholder="basketball"/>    </form></body>

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