相关代码：

<div class="banner_mask">
                <p>banner遮罩层</p>
                <form action="">
                   <P>
                   <input type="text" placeholder="Your Name"> 
                   <input type="text" placeholder="Your Phone">
                   <input type="email" placeholder="Your Email">
                   <textarea name="" id="" cols="30" rows="10" placeholder="Write Your Comment Here"></textarea>
                   </P>
                   <p><input type="submit" value="SEND MESSAGE" ></p>
                </form>
            </div>