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('content_4').style.display = 'none';
document.getElementById('content_5').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('tab_4').className = ''; 
document.getElementById('tab_5').className = '';      
document.getElementById(new_tab).className = 'active';        

}