Here is a working version: http://jsfiddle.net/6Ccj7/
Your html is broken.  Change this:
| //BODY CONTENT 2// | 
To this:
| //BODY CONTENT 2// | 
Also, you used id for film when in fact you have 2 instances.  You class instead:
       | //HEAD CONTENT 1// | 
       
       | //BODY CONTENT 1// | 
       | //HEAD CONTENT 2// | 
       
       | //BODY CONTENT 2// | 
Here is the updated JS:
$(document).ready(function(){
$('.film td').hide();});
$(document).ready(function(){
var n1 = 0;
      $('.film th.1').click(function(){
         if(n1 == 0){
         $('.film td.1').show();
         n1 = 1;
         }else{
        $('.film td.1').hide();
         n1 = 0;}
       });
var n2 = 0;
      $('.film th.2').click(function(){
         if(n2 == 0){
         $('.film td.2').show();
         n2 = 1;
         }else{
        $('.film td.2').hide();
         n2 = 0;}
       });
});