怎么解决
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>课工场论坛列表</title>
<link href="css/bbs.css" rel="stylesheet">
</head>
<body>
<div class="bbs">
<header><span οnclick="post()">我要发帖</span></header>
<section>
<ul id="postList"></ul>
</section>
<div class="post" id="post">
<input class="title" placeholder="请输入标题（1-50个字符）"id="title">
所属版块：<select>
<option>请选择版块</option>
<option>电子书籍</option>
<option>新课来了</option>
<option>