Changing search field from idinfo/keywords/theme/placekey to placekey
limit searching to "common" fields that are indexed.include checkbox to search all fields.see bug #3174
handle special case for searching both SANParks and SAEON (but not all of KNB)
use keyword for restricting the search by node
comment out annoying alert() debug statements
use 'squery' searching so that both EML and FGDC can be searched based on location and an anyfield search string.changed 'All' to use empty string ("") value rather than "%" - plays better with QueryGroup