// JavaScript Document

   function tabSwitch(new_tab, new_content) {  
          
        document.getElementById('content_1').style.display = 'none';  
        document.getElementById('content_2').style.display = 'none';  
        document.getElementById('content_3').style.display = 'none'; 
        document.getElementById(new_content).style.display = 'block';     
          
      
        document.getElementById('tab_1').className = '';  
        document.getElementById('tab_2').className = '';  
        document.getElementById('tab_3').className = '';     
        document.getElementById(new_tab).className = 'active';        
    
  }