javascript - Jquery not skipping php if condition -

the jquery language bit french me apologies if 1 of less smarter questions consider this:

page1.php

<form action="page2.php" method="post"> stuff </form> 

page2.php

 //form values posted 2 form2     <?php      session_start();     //check if user logged in     //if user not logged in display modalbox     if(!isset($_session['members']) || !isset($_session['fbid'])){         ?>        <script type="text/javascript">         jquery(document).ready(function() {         $.fancybox(             '<h2>hi!</h2><p>this login form be</p>',             {                     'autodimensions'    : false,                 'width'                 : 350,                 'height'                : 'auto',                 'transitionin'      : 'none',                 'transitionout'     : 'none'             }         );     });    </script>     <?php     }//if not logged in     ?>       <?php     else{     //do stuff logged on user  values posted page1.php     } 

my problem

regardless if user logged in or not login modal box gets displayed.

according logic if user logged in modal box should not displayed , code should go else part

 if(!isset($_session['members']) || !isset($_session['fbid'])){ 

wants be

if(!isset($_session['members']) && !isset($_session['fbid'])){ 

so modal shows if user isn't logged in either method