function UMTC_start() {
	input = document.getElementById("start_input");
	
	if (input.checked) {
		document.cookie = "UMTC_start=0;path=/;expires=Thu, 01-Jan-1970 00:00:01 GMT";
	} else {
		var exdate = new Date();
		exdate.setDate(exdate.getDate() + 30);

		document.cookie = "UMTC_start=" + 0 + ";path=/;expires=" + exdate.toUTCString();
	}
}