lovecoding
/
class


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            list-style: none;
            text-decoration: none;
            box-sizing: border-box;
        }
       ul {
        display: none;
       }
    </style>
</head>
<body>
    <h2>管理区</h2>
    <ul id="manager">
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
    </ul>
    <h2>内容区</h2>
    <ul id="main">
        <li>a</li>
        <li>b</li>
        <li>c</li>
        <li>d</li>
    </ul>
    <script>
        var h2 = document.getElementsByTagName("h2");
        console.log(h2)
        for(var i=0; i<h2.length;i++) {
            h2[i].onclick = function() {
                // console.log(this.nextSibling);
                var ul1 = next(this)
                console.log(ul1);
                // ul1.style.display = 'block'
                if(ul1.style.display == 'none') {
                    ul1.style.display = 'block'
                } else {
                    ul1.style.display = 'none'
                }

            }
        }
        function next(ele) {
            do {
                ele = ele.nextSibling;
            }while(ele.nodeType != 1)
            return ele;
        }
    </script>
</body>
</html>