var progress = false;

function js_calendar(tst){
	//if(progress) return false;
	progress = true;
	url = jQuery('#tst_'+tst).attr('href'); //absolut
	jQuery('#tst_'+tst).removeAttr('href');
	data = {'tx_schedule_pi3[select]':tst};
	
	jQuery.post(
		url, 
		data, 
		function(result){
			jQuery('.tx-schedule-pi3').html(result);
			progress = false;
		}
	);
}