code: function(value){
      var self = this;
      this.value = value;
      this.button = $('<div class="priority"></div>');
      this.selected = false;
      this.color = todo.priority_colors[value]
      // Bind the action the button
      $(this.button).click(function(){
        self.select();
      }).css({
        'background-image': 'url("priority_' + value + '.png")'
      });
      return this
    }
docs: /*
  priority_button
  
  Constructor for the traffic-light-style buttons used to select the new item's priority.