額，我代碼過不去怎么回事?
<!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">做為一個(gè)Web開發(fā)師來說，如果你想提供漂亮的網(wǎng)頁、令用戶滿意的上網(wǎng)體驗(yàn)，JavaScript是必不可少的工具。</p>
??? <form>
?????? <input type="button" onclick="hidetext()" value="隱藏內(nèi)容" />
?????? <input type="button" onclick="showtext()" value="顯示內(nèi)容" />
??? </form>
</body>
</html>
2016-09-05
var?mychar = document.getElementById("con").style.display="none";不能這么寫，
應(yīng)該是：var?mychar = document.getElementById("con")；
????????????mychar.style.display="none ";