plugin_parameters : useless here
plugin_javascript : the javascript function called when the user enters the subfield. contain 3 javascript functions : * one called when the field is entered (OnFocus) named FocusXXX * one called when the field is left (onBlur ) named BlurXXX * one called when the ... link is clicked (onClick) named ClicXXX
returns : * XXX * a variable containing the 3 scripts. the 3 scripts are inserted after the <input> in the html code
plugin: useless here.