表单

text

账号: <input type="text" name="username"><br/>
密码: <input type="password" name="password"><br/>

file

文件: <input type="file" name="file">

radio

<input type="radio" name="sex" value="male">Male<br/>
<input type="radio" name="sex" value="female">Female

checkbox

<input type="checkbox" name="vehicle" value="Bike">I have a bike<br/>
<input type="checkbox" name="vehicle" value="Car">I have a car

select

<select name="cars">
    <option value="volvo">Volvo</option>
    <option value="saab">Saab</option>
    <option value="fiat" selected>Fiat</option>
    <option value="audi">Audi</option>
</select>

textarea

<textarea rows="10" cols="30">
    我是一个文本框。
</textarea>

button

<input type="button" onclick="alert('你好，世界!')" value="点我!">
<input type="submit" value="提交!">
<button type="button" onclick="alert('你好，世界!')">点我!</button>
<button type="submit">提交!</button>

clear

document.getElementById("myForm").reset();

$("#myForm").find('input[type=text],select,input[type=hidden]').each(function() {
    $(this).val('');
});

$(':input', '#myForm').each(function () {
    var type = this.type;
    var tag = this.tagName.toLowerCase();
    if (type == 'text' || type == 'password' || tag == 'textarea' || type == "hidden") {
        this.value = "";
    } else if (type == 'checkbox' || type == 'radio') {
        this.checked = false;
    } else if (tag == 'select') {
        this.selectedIndex = -1;
    }
});

readonly 和 disabled

	作用域	表单提交
readonly	text/password/textarea	传递
disabled	所有表单元素	不传递