function Mode()
{
  this.name = "Unknown";
  
  this.widget = function()
  {
    return this.name;
  }
  
  this.mouse_down = function(event)
  {
    
  }
  
  this.mouse_move = function(event)
  {
    
  }
  
  this.mouse_up = function(event)
  {
    
  }
}