Untitled

var iframe=document.createElement('iframe');
iframe.src="mypage/index.php?userID=123&pass=123&balance=234&etc....";
document.body.appendChild(iframe);

<?php
    session_start();
    $_SESSION['userID']="123";
    $_SESSION['pass']="123";
    $_SESSION['pass']="230";
   //.....more info
    ?>

    <html>
    <head>
    <title></title>
    <script type="text/javascript" src="http://myweb.com/main.js"></script>
    </head>
    <body>

    <div id="MyContent">

    </body>
    </html>

$(document).ready(function(){
                var iframe=document.createElement('iframe');
    iframe.src="mypage/index.php?userID=123&pass=123&balance=234&etc....";
    document.body.appendChild(iframe);
            });

<?php
// I think of something like this
Expected_variable['id']=$_SESSION['userID'];
Expected_variable['pass']=$_SESSION['pass'];
Expected_variable['balance']=$_SESSION['balance'];

//currently
$data['id']=$_GET['userID'];
$data['pass']=$_GET['pass'];
$data['balance']=$_GET['balance'];

//process........
?>