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 = 'prodActive';        
     
   }