Default Values Every element automatically has these default values (see system_element_info()): #description = NULL #attributes = array() #required = FALSE #tree = FALSE #parents = array() The following is a list of default values which do not need to be set (found in system_element_info): button #name = 'op' #button_type = 'submit' #executes_submit_callback = FALSE #ajax['event'] = 'mousedown' c