                        课程
                    
                        /前端开发
                        
                            /JavaScript
                        
                        /JavaScript入门篇

额，我代码过不去怎么回事?

<!DOCTYPE HTML>
<html>
<head>
<meta charset="UTF-8">
<title>display</title>
    <script>
        function hidetext(){
      var mychar = document.getElementById("con").style.display="none";
  }
  function showtext(){
      var mychar = document.getElementById("con").style.display="block";
  }
    </script>
</head>
<body>
    <h1>JavaScript</h1>
    <p id="con">做为一个Web开发师来说，如果你想提供漂亮的网页、令用户满意的上网体验，JavaScript是必不可少的工具。</p>
    <form>
       <input type="button" onclick="hidetext()" value="隐藏内容" />
       <input type="button" onclick="showtext()" value="显示内容" />
    </form>
</body>
</html>