function toggle_visibility_main2() 
    {
    
        var s = document.getElementById("embarazo_main");
                
        if(s.style.display == 'none')
        {
        
            s.style.display = 'block';
                    
        } else {
        
              s.style.display = 'none';             
        
        } 
        
        
        } 
            /*
function showMe (it, box) {
var vis = (box.checked) ? "block" : "none";
document.getElementById(it).style.display = vis;
 */