php ขอคำแนะนำ วิธีแจ้งเตือนด้วย plugin jquery notification

$strSQL2 = "SELECT * FROM member WHERE email = '".trim($_POST['email'])."' ";
$objQuery2 = mysql_query($strSQL2);
$objResult2 = mysql_fetch_array($objQuery2);
if($objResult2){
		  echo "<meta http-equiv='Content-Type' content='text/html; charset=tis-620' />";
		  echo "<script language='javascript'>alert('Email already used Please change your email')</script>";
	          echo "<script language='javascript'>history.back();</script>";
}