code: function(options) { 
  		inputEx.MapField.superclass.setOptions.call(this, options);
  		this.options.className = options.className || 'inputEx-Field inputEx-MapField';
  		
  		this.options.width = options.width || '400px';
  		this.options.height = options.height || '400px';
  		this.options.loading = options.loading || 'loading....';
  
  		this.options.lat = options.lat || inputEx.MapFieldGlobals.lat;
  		this.options.lon = options.lon || inputEx.MapFieldGlobals.lon;
  		this.options.uzoom = options.uzoom || inputEx.MapFieldGlobals.uzoom;
  		this.options.api = options.api || inputEx.MapFieldGlobals.api;
  		this.options.api_key = options.api_key || inputEx.MapFieldGlobals.api_key;
  	}
docs: Adds the 'inputEx-MapField' default className