请问这里的账号value为什么不显示?

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>QQ拖拽效果</title>
</head>
<link rel="stylesheet" type="text/css" href="css/main.css">
<script type="text/javascript" src="js/script.js"></script>
<body>
<section id="main">
<section id="bg_close"></section>
<section id="bg_login_up"></section>
<section id="up">
<span id="up_txt">账号</span>
<input type="text" id="up_txt" value="请输入你的QQ账号或Email">
</section>
<section id="down">
<span id="down_txt">密码</span>
<input type="text" id="txt2" value="请输入你的密码">
</section>
<section id="bg_login_down"></section>
<section id="state">
<section id="state_img"></section>
<section id="state_img1"></section>
<span id="state_txt">我在线上</span>
<ul id="list">
<li id="online">
<div id="online_img"></div>
<span id="online_txt">我在线上</span>
</li>
<li id="talk">
<div id="talk_img"></div>
<span id="talk_txt">Q我吧</span>
</li>
<li id="away">
<div id="away_img"></div>
<span id="away_txt">离开</span>
</li>
<li id="busy">
<div id="busy_img"></div>
<span id="busy_txt">忙碌</span>
</li>
<li id="noplay">
<div id="noplay_img"></div>
<span id="noplay_txt">请勿打扰</span>
</li>
<li id="nosee">
<div id="nosee_img"></div>
<span id="nosee_txt">隐身</span>
</li>
</ul>
</section>

</section>
</body>
</html>

就是这个value:

<input type="text" id="up_txt" value="请输入你的QQ账号或Email">

 拜托大神了!http://img.mukewang.com/5810bddc00019a2f04140296.jpg

Mileswongke
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1回答

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