var calendar = new CalendarPopup("calendardiv");
	calendar.setCssPrefix("CALENDAR");
	calendar.showYearNavigation();
	calendar.showYearNavigationInput();
			
	function isValidDate(d) {
		var dateRegEx = /^((((0?[1-9]|[12]\d|3[01])[\.\-\/](0?[13578]|1[02])[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}))|((0?[1-9]|[12]\d|30)[\.\-\/](0?[13456789]|1[012])[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}))|((0?[1-9]|1\d|2[0-8])[\.\-\/]0?2[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}))|(29[\.\-\/]0?2[\.\-\/]((1[6-9]|[2-9]\d)?(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00)|00)))|(((0[1-9]|[12]\d|3[01])(0[13578]|1[02])((1[6-9]|[2-9]\d)?\d{2}))|((0[1-9]|[12]\d|30)(0[13456789]|1[012])((1[6-9]|[2-9]\d)?\d{2}))|((0[1-9]|1\d|2[0-8])02((1[6-9]|[2-9]\d)?\d{2}))|(2902((1[6-9]|[2-9]\d)?(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00)|00))))$/;
		return d.match(dateRegEx);
	}
	function isValidHour(h) {
		var timeRegEx = /^([01]\d|20|21|22|23):[012345]\d$/;
		return h.match(timeRegEx);
	}
	function validateForm(f) {
		if(f.fecha_inicio.value == "" || f.fecha_fin.value == "" )
			alert("La fecha de salida y regreso deben de especificarse.");
		else
			return true;
		return false;
	}