function updateCities () {
    selectedField = $('island').options[$('island').selectedIndex].value;
    selectedField = (selectedField == "") ? "" : selectedField;
   	new Ajax.Updater('search_cities', '/hawaii-mls/search.php?getCityList=' + selectedField, {
                      onComplete:function(request) { },
	      			  evalScripts:true, asynchronous:true });
}

function updateNeighborhoods () {
    selectedField = $('island').options[$('island').selectedIndex].value;
    selectedField = (selectedField == "") ? "" : selectedField;
   	new Ajax.Updater('search_neighborhoods', '/hawaii-mls/search.php?getNeighborhoodList=' + selectedField, {
                      onComplete:function(request) { },
	      			  evalScripts:true, asynchronous:true });
}