var lt_index = 0;
$(document).ready(function() {
	$('#lt_0').fadeIn('fast');
});
function next_lt(){
	var temp_lt = lt_index;
	lt_index = (lt_index + 1) % lt_count;
	$('#lt_' + temp_lt).fadeOut('slow', function(){
		$('#lt_' + lt_index).fadeIn('fast');
	});
}

function prev_lt(){
	var temp_lt = lt_index;
	lt_index = (lt_index + lt_count - 1) % lt_count;
	$('#lt_' + temp_lt).fadeOut('slow', function(){
		$('#lt_' + lt_index).fadeIn('fast');
	});
}