function show_form_error(target,msg){
	$doc = $(window.parent.document);
	$(target.replace('err_',''),$doc).addClass('error');
	$(target,$doc).html(msg).css('display','inline');
	return;
}

function hide_form_error(target){
	$doc = $(window.parent.document);
	$(target.replace('err_',''),$doc).removeClass('error');
	$(target,$doc).hide();
	return;
}

function empty_form_error(target){
	$doc = $(window.parent.document);
	$(target.replace('err_',''),$doc).removeClass('error');
	$(target,$doc).empty().hide();
	return;
}