Html “怎么做？”；href=#”等；关闭模式框？

我不明白单击“关闭”链接将如何关闭对话框

<a href="#openModal">Open Modal</a>

<div id="openModal" class="modalDialog">
    <div>   <a href="#openModl" title="Close" class="close">X</a>

            <h2>Modal Box</h2>

        <p>This is a sample modal box that can be created using the powers of CSS3.</p>
        <p>You could do a lot of things here like have a pop-up ad that shows when your website loads, or create a login/register form for users.</p>
    </div>
</div>

单击链接OpenModel时：选择器被激活，因此不透明度设置为1。
当您单击#openModl（与#openModal不同）时，将删除：目标，不透明度恢复为0。

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简单；-）

在模式关闭链接的单击事件后面必须有一些javascript代码。没有单击事件，这是您可以在浏览器中尝试的所有代码。

.modalDialog {
    position: fixed;
    font-family: Arial, Helvetica, sans-serif;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 99999;
    opacity:0;

    pointer-events: none;
}
.modalDialog:target {
    opacity:1;
    pointer-events: auto;
}
.modalDialog > div {
    width: 400px;
    position: relative;
    margin: 10% auto;
    padding: 5px 20px 13px 20px;
    border-radius: 10px;
    background: #bbb;

}
.close {
    background: #777777;
    color: #Fbbbbb;
    line-height: 25px;
    position: absolute;
    right: -12px;
    text-align: center;
    top: -10px;
    width: 24px;
    text-decoration: none;
    font-weight: bold;
    -webkit-border-radius: 12px;
    -moz-border-radius: 12px;
    border-radius: 12px;
    -moz-box-shadow: 1px 1px 3px #000;
    -webkit-box-shadow: 1px 1px 3px #000;
    box-shadow: 1px 1px 3px #000;
}
.close:hover {
    background: #00d9ff;
}