<html lang="en"> <head> <title>Sign Up</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css"> <link rel="stylesheet" href="../style.css" type="text/css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script> <script src="https://code.jquery.com/jquery-2.1.1.min.js" type="text/javascript"></script> <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script> <!-- <?php require_once "../register/membersite.php"; $dbLog = new Membersite(); $dbLog->InitiDB("localhost", "root", "", "testblog", "users"); $dbLog->DBLogin(); $dbLog->SaveToDatabase(); $dbLog->closeCon(); ?> --> <script> function checkAvailability(){ $("#loaderIcon").show(); jQuery.ajax({ url: "check_availability.php", data: 'username='+$("#username").val(), type: "POST", success:function(data){ $("#user-availability-status").html(data); $("#loaderIcon").hide(); }, error:function(){},