// JQUERY

$(function() {
$("#submit_login").click(function() {
var username = $("#email").val();
var password = $("#password").val();


if(username && password != '')
{
$.ajax({
type: "POST",
url: "/design/index.php",
username: username,
password: password,
success: function(){
alert('Data sent!');
}
});
}
return false;
});
});

// HTML

<form action="" method="post">
  <input type="text" name="uname" id="email" class="input_login_2" value="e-mail adress" onclick="clickclear(this, 'e-mail adress')"
  onblur="clickrecall(this,'e-mail adress')">
<br>
  <input type="password" name="pword" id="password" class="input_login" value="password" onclick="clickclear(this, 'password')"
  onblur="clickrecall(this,'password')">
<br>
  <input type="submit" name="submit_login" class="input_submit" value="login!" id="submit_login">
</form>

// PHP SCRIPT

if(isset($_POST['submit_login'])) {

	$email = mysql_real_escape_string($_POST['uname']);
	$password = mysql_real_escape_string(sha1($_POST['pword']));


	$query = mysql_query("SELECT * FROM members WHERE email = '$email' AND password =
	'$password' LIMIT 1") or die($mysqlerror);
	$row = mysql_fetch_array($query);


	if(mysql_num_rows($query) > 0)
	{

  // Start sessions
  $_SESSION["user_1"] = true;
  $_SESSION['username'] = $_POST['username'];
  header("Location: site");
  exit;

	} else {  }
}