function tabSwitch_2(active, number, tab_prefix, content_prefix) {  
for (var i=1; i < number+1; i++) {  
document.getElementById(content_prefix+i).style.display = 'none';  
document.getElementById(tab_prefix+i).className = '';  
}  
document.getElementById(content_prefix+active).style.display = 'block';  
document.getElementById(tab_prefix+active).className = 'active';      
}