$(function()
{	
	$('.periods').change(function()
	{
		var group_id = $(this).parents('form')[0].group_id.value;
		var url = 'data/?group_id=' + group_id + '&period=' + $(this).val();
		$('#cnt_' + group_id).load(url);
	});
	
	$('.group_periods').change(function()
	{
		location.href = window.location.pathname + '?table_period=' + $(this).val();
	});
	
	function reload_after_5_min()
	{
		var interval = Math.floor(Math.random()*3+4);
		setInterval(function()
		{
			location.href = location.href;
		}, interval*60*1000);
		
	}
	
	reload_after_5_min();
});