<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> *{ margin: 0; padding: 0; } ul{ width: 500px; height: 400px; border: 1px solid red; position: fixed; margin: 0 auto; left: 0; right: 0; top: 50%; transform: translate(0,-50%); text-align: center; display: flex; flex-wrap: wrap; justify-content: space-evenly; align-items: center; } ul>li{ list-style: none; width: 70px; height: 40px; font-size: 10px; text-align: center; line-height: 40px; font-weight: bold; color: #333; background: #a19292; border: 1px solid white; display: inline-block; align-content: center; } div{ width: 150px; height: 100px; border-left: 1px solid #a19292; border-right: 1px solid #a19292; box-shadow: #a19292; line-height: 100px; } .click{ background-color: orange; color: white; } </style> </head> <body> <ul> <li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li> <li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li> <li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li> <div>屏幕中央</div> </ul> <script> var lis = document.getElementsByTagName('li'); for(var i = 0;i<lis.length;i++){ lis[i].onclick = function () { let res = this.getAttribute('class'); if(!res){ let res = this.setAttribute('class','click') this.innerHTML = '座位已被选' }else{ let res = this.setAttribute('class','') this.innerHTML = '' } } } </script> </body> </html>