The ID of a field to monitor for changes. If a change occurs in the monitored field the select box will refresh. If updateWamName and updateWrName have been specified, the weblet will call the Webroutine to request a fresh copy of the working list, if one was specified in the items property. Otherwise it will re-apply the selectorValueField filter to the list it already has and rebuild the menu list from that.
Fields built around the <input> and <select> elements can be monitored (this is all standard fields except the Text Area).
Blank - no field is monitored.
The ID of any <input> or <select> element on the current page. For standard weblets, this is the same as the id property of the weblet.