function toggle(name)  
{  
var id = document.getElementById(name);  
  
  if(id.style.display == '') // Invisible? Show it  
  {  
  id.style.display = 'block';  
  }  
  else if(id.style.display == 'block') // Visible? Hide it  
  {  
  id.style.display = '';  
  }  
}