一晚上 就画了一个div 效率啊
<!DOCTYPE html><html lang="en">
<head>
<meta charset="UTF-8">
<title>这是一个测试flask的前端网页</title>
<style>
label { float: left; width: 10em; margin-right: 1em; text-align: right; }
#logtit {margin-left:180px;}
#logclick {margin-left:180px;}
#logout {margin-left:30px;}
div{ border:1px solid blue}
#divlogin {margin-top:250px ;width:500px;margin-left:400px;height:180px}
</style>
</head>
<body>
<div id ="divlogin">
<h3 id="logtit" >用户登录界面</h3>
<form method="POST">
<label>用户名:</label><input type="text" name="username" value=""><br>
<label>密   码:</label><input type="password" name="password" value=""><br><br>
<input id="logclick" type="submit" value="登录">
<input id="logout" type="submit" value="退出">
</form>
{% if name %}
<span>{{uname}}{{string}}</span>
{% endif %}
{% if name2 %}
<span>{{uname}}{{string2}}</span>
{% endif %}
</div>
<script>
onload=function(){
document.getElementsByName("username").focus()
}
</script>
</body>
</html>
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