$().ready(function() {
	// check if there is data
	if ($('select#search_region').val() != 'Any'){
		 $('select#search_district').removeAttr("disabled"); 	
	}
	if ($('select#search_district').val() != 'Any'){
		 $('select#search_suburb').removeAttr("disabled"); 	
	}	
})

function clearDefault(el) {
	if ('keyword or listing number'==el.value) el.value = ""
}

function setDefault(el){
	if (el.value=='') {
		el.value = 'keyword or listing number';
	}
}
     
function checkDistrict(region){
	region_value = region.value;
	$.post('ajax.php', {'a': 1, 'region' : region_value}, function(data) {
        $('select#search_district').html(data);        
        $('select#search_district').removeAttr("disabled");    
	});
}

function checkSuburb(district){
	district_value = district.value;
	$.post('ajax.php', {'a': 2, 'district' : district_value}, function(data) {
		$('select#search_suburb').html(data);
        $('select#search_suburb').removeAttr("disabled");    
	});
}

function sorForm(){
	document.frmsort.submit();
	return False;
}