callendar = 0;
function showHideCallendarMenu(){
	if (callendar == 0){
		window.document.getElementById('callendar-menu').style.visibility = 'visible';
		window.document.getElementById('callendar-menu').style.height = 'auto';
		callendar = 1;
	}else if (callendar == 1){
		window.document.getElementById('callendar-menu').style.visibility = 'hidden';
		window.document.getElementById('callendar-menu').style.height = '0px';
		callendar = 0;
	}
}