如何在页面加载时隐藏下拉部分

我有一个div，一旦单击按钮就会向下滑动。此功能工作正常，但目前下拉部分已在页面加载时切换。如何在单击按钮之前将其隐藏？

JSFiddle Link： http://jsfiddle.net/maddiwu/xe6xtfqh/

.slide {
    overflow-y: hidden;
    max-width: 100%;
    overflow-x: hidden;
    max-height: 100vw;
    /* approximate max height */
    width:100%;
    /*height: 45vw;*/
    background:#2e2e2e;
    transition-property: all;
    transition-duration: 1s;
    transition-timing-function: cubic-bezier(1, 1, 1, 1);
}
.slide.closed {
    max-height: 0;
}
.banner7 {
    width:80%;
    background:#d8d8d8;
    margin-top:1.5vw;
    padding-top:2vw;
}
.banner8 {
    width:80%;
    background:#2e2e2e;
    margin-top:1vw;
    margin-left:10%;
    padding-top:2vw;
}

<center>
    <div class="banner7" style="margin-bottom:0vw;margin-top:2vw;">
        	<h1 style="color:#B40404;font-size:2.5vw;margin:1.5vw;font-family:Futura;">MAIN SECTION</h1>
        <p style="font-family:Helvetica Neue;font-size:1vw;color:back;margin-left:5vw; margin-right:5vw; text-align:center; margin-top:-1vw;margin-bottom:3vw;">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa.</p>
        <table style="width:95%; margin-left:2%;">
            <tr>
                <td>
                    <div style="background:white;width:21vw;margin-top:0vw;margin-bottom:2vw;padding:1vw;">
                        	<h1 style="color:#b40404;font-size:1.5vw;font-family:Futura; text-align:center;margin-top:1vw;">SUB SECTION ONE</h1>
                        <p style="font-family:Helvetica Neue;font-size:1vw;color:#2e2e2e; text-align:center; margin-top:1vw;margin-bottom:1vw;">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.</p>
                        <center>
                            <img src="images/button.png" style="width:35%;height:3vw;margin-top:1vw; margin-bottom:1vw;" onmouseover="this.src='images/button-hover.png'" onmouseout="this.src='images/button.png'" onload="closed" onclick="document.getElementById('slide').classList.toggle('closed');" />
                        </center>
                    </div>
                </td>
                <td>
                    <div style="background:white;width:21vw;margin-top:0vw;margin-bottom:2vw;padding:1vw;">
                        	<h1 style="color:#b40404;font-size:1.5vw;font-family:Futura; text-align:center;margin-top:1vw;">SUB SECTION TWO</h1>
                        <p style="font-family:Helvetica Neue;font-size:1vw;color:#2e2e2e; text-align:center; margin-top:1vw;margin-bottom:1vw;">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.</p>
                        <center>
                            <img src="images/button.png" style="width:35%;height:3vw;margin-top:1vw; margin-bottom:1vw;" onmouseover="this.src='images/button-hover.png'" onmouseout="this.src='images/button.png'" onclick="document.getElementById('slide').classList.toggle('closed');" />
                        </center>
                    </div>
                </td>
                <td>
                    <div style="background:white;width:21vw;margin-top:0vw;margin-bottom:2vw;padding:1vw;">
                        	<h1 style="color:#b40404;font-size:1.5vw;font-family:Futura; text-align:center;margin-top:1vw;">SUB SECTION THREE</h1>
                        <p style="font-family:Helvetica Neue;font-size:1vw;color:#2e2e2e; text-align:center; margin-top:1vw;margin-bottom:1vw;">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.</p>
                        <center>
                            <img src="images/button.png" style="width:35%;height:3vw;margin-top:1vw; margin-bottom:1vw;" onmouseover="this.src='images/button-hover.png'" onmouseout="this.src='images/button.png'" onclick="document.getElementById('slide').classList.toggle('closed');" />
                        </center>
                    </div>
                </td>
            </tr>
        </table>
    </div>
</center>
<div>
    <div class="slide" id="slide">
        <div style="width:100%; background:#2e2e2e; padding:1vw; text-align:center;">
            <table style="width:80%">
                <tr>
                    <td>
                        <iframe style="margin-left:20%;width:45vw;height:30vw;" src="//www.youtube.com/embed/P7mS83pOPso" frameborder="0" allowfullscreen></iframe>
                    </td>
                    <td>
                        <center>
                            	<h1 style="color:#d8d8d8;font-size:2.5vw;font-family:Futura; text-align:center;margin-top:0vw;margin-left:20vw;">DROP SECTION</h1>
                            <p style="font-family:Helvetica Neue;font-size:1vw;color:white;margin-left:11vw;margin-right:-8vw; text-align:center; margin-top:1vw;">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem.</p>
                    </td>
                </tr>
            </table>
            </center>
        </div>
        <div style="width:100%; background:#d8d8d8; padding:1vw; text-align:center;">
            <center>
                <center>
                    	<h1 style="color:#b40404;font-size:2.5vw;font-family:Futura; text-align:center;margin-top:2vw;">DROP SECTION</h1>
                    <p style="font-family:Helvetica Neue;font-size:1vw;color:#2e2e2e;margin-right:10vw;margin-left:10vw; text-align:center; margin-top:-1vw;margin-bottom:2vw;">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem.</p>
                </center>
                </td>
                </tr>
                </table>
            </center>
        </div>
    </div>
</div>
</div>
<br>