Untitled

<html>
<head>
<title>Show Error Message</title>
</head>
<body>
<table cellspacing=3 cellpadding=3>
<form action="" method="post">

<tr><td>Username:</td><td><input type="text" name="input1" size=20></td></tr>
<tr><td>Password:</td><td><input type="password" name="input2" size=20></td></tr>
<tr><td>&nbsp;</td><td><input type="submit" name="submit" value="Login!"></td></tr>

</form>
</table>
</body>
</html>
<?php
if(isset($_POST['submit'])){
$error_msg="";
$input1=$_POST['input1'];
$input2=$_POST['input2'];
	if($input1==""){
	$error_msg .= "You need to enter username";
	}
	else {
	$error_msg="Username is Filled!";
	}
}
?>