<form>
        @*html5确实牛，有一个基本的自检功能*@
        <label>邮箱地址：</label>
        <input type="email" required="required" />
        @*输入的类型为数字，最大值为0，最小值为100,只能是0,5,10,这里就不需要required*@
        <br />
        <label>年龄：</label>
        <input type="number" min="0" max="100" step="5" />
        <br />
        <input type="range" min="0" max="100" required="required" />
        <br />
        <label>站内搜索</label>
        <input type="search" placeholder="搜索" required="required" />
        <br />
        <label>请收入网址</label>
        <input type="url" placeholder="http://" required="required" />
        <br />
        <label>日期</label>

        <input type="date" required="required" />
        <br />
        <label>月</label>
        <input type="month" required="required" />
        <br />
        <label>星期</label>
        <input type="week" required="required" />
        <br />
        <label>时间</label>
        <input type="time" required="required" />
        <br />
        <label>当地时间</label>
        <input type="datetime-local" required="required" />
        <br />

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