function advancedQuery(){
	f = document.searchoffers;
	f.submit_display_options.blur();
	f.submit_display_options.disabled = true;
	f.submit_display_options.value = 'searching...';
	if(f.p.value == ''){
		alert('Postal code cannot be blank');
		f.p.focus();
		f.submit_display_options.disabled = false;
		f.submit_display_options.value = 'search';
		return false;
	}
	else {
		f.submit();
		return true;
	}
}