一个关于JS来点亮点击之后连接的问题

那太简单了
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>透明层重叠</title>
        <style type="text/css">
            #cc {
                opacity: 80;
                width: 100%;
                height: 50%;
                cursor: pointer;
                margin: 5px 5px;
                background-color: transparent;
            }
            
            a.ss:focus {
                color: red;
            }
        </style>
    </head>
    <body>
        <a class="ss" href="#1">d45454</a>
        <a class="ss" href="#2">d45454</a>
        <a class="ss" href="#3">d45454</a>
    </body>
</html>