ceck valid

<!DOCTYPE html>
<html>
<head>
	<title></title>    <link href="css/bootstrap.min.css" rel="stylesheet">
</head>
<body >
<div style="width:100%;height:800px;background-color:gray;">
	<div align="center"> <img src="image/header.jpg" width="70%;" height="130px;"></div>
	<div style="width:70%;height:auto;background-color:lavender;margin-left:auto;margin-right:auto;" align="center"><b><h2>LUPA PASSWORD</h2></b></div>
		<div style="width:70%;height:400px;;background-color:lavender;margin-left:auto;margin-right:auto;margin-top:10px;" align="center">
		<div align="center"  style="width:30%;">
		<br/><br/><br/>
			<form method="post" action="combineqna.php">
				<tr>
					<td><input type="text" class="form form-control" name="user" placeholder="Username"></td>
				</tr>
				<br/>
				<tr>
					<td><input type="submit" name="submit" value="Ceck">
					</td>
				</tr>
			</form>
		</div>
		</div>
</div>
</body>
</html>