function toggle_visibility(id) {
    var a = document.getElementById(id);
  var m = document.getElementById(id+'M');
   // var e = document.getElementById(id+'E');
    
    if(a.style.display == 'block'){
      a.style.display = 'none';      
   m.innerHTML = " more »";
    //  e.innerHTML = "[...] ";            
    }
    else{
      a.style.display = 'block';      
 m.innerHTML = ""; 
   //   e.innerHTML = "";       
    }
}