function prevday() {
	var date1 = new Date(document.getElementById("day").value);
	date1.setDate(date1.getDate()-1);
	if (date1.getYear()<100) {
		date1.setYear(date1.getYear()+2000)
	}
	document.getElementById("day").value=datetostr(date1);
	updateDates();
}

function nextday() {
	var date1 = new Date(document.getElementById("day").value);
	date1.setDate(date1.getDate()+1);
  if (date1.getYear()<100) {
		date1.setYear(date1.getYear()+2000)
	}
	document.getElementById("day").value=datetostr(date1);
	updateDates();
}

function while_animate() {
	var d1 = document.getElementById("dayone").value;
	var d2 = document.getElementById("daytwo").value;
  cal.manageFields("dayone", "dayone", "%m/%d/%Y");
  cal.manageFields("daytwo", "daytwo", "%m/%d/%Y");
	document.getElementById("time_options").innerHTML='<table><td>Start:<br><input id="dayone" type="text" style="width:70px;" name="dayone" value="'+d1+'" onkeypress="if(event.keyCode==13){updateDates()}"></td><td></td><td>End:<br><input id="daytwo" type="text" style="width:70px;" name="daytwo" value="'+d2+'" onkeypress"if(event.keyCode==13){updateDates()}"/></td></table><table><td><input id="mybutton" type="button" value="Update" onClick="updateDates()"></td><td><input id="animatebutton" type="button" value="Stop" onClick="Stopanimate()"></td></table>';
}

function Stopanimate() {
	var d1 = document.getElementById("dayone").value;
	var d2 = document.getElementById("daytwo").value;
	stop_id=1;
	document.getElementById("time_options").innerHTML='<table><td>Start:<br><input id="dayone" type="text" style="width:70px;" name="dayone" value="'+d1+'" onkeypress="if(event.keyCode==13){updateDates()}"></td><td></td><td>End:<br><input id="daytwo" type="text" style="width:70px;" name="daytwo" value="'+d2+'" onkeypress"if(event.keyCode==13){updateDates()}"/></td></table><table><td><input id="mybutton" type="button" value="Update" onClick="updateDates()"></td><td><input id="animatebutton" type="button" value="Animate" onClick="animate_updateDates()"></td></table>';
  cal.manageFields("dayone", "dayone", "%m/%d/%Y");
  cal.manageFields("daytwo", "daytwo", "%m/%d/%Y");
}

function updateDates() {
	if (document.getElementById("oneday").checked==true) {
		var date1 = new Date(document.getElementById("day").value);
		var date2 = new Date(document.getElementById("day").value);
	}else {
		var date1 = new Date(document.getElementById("dayone").value);
		var date2 = new Date(document.getElementById("daytwo").value);
	}
	date2.setDate(date2.getDate()+1);
	if (date1.getYear()<100) {
		date1.setYear(date1.getYear()+2000)
	}
	if (date2.getYear()<100) {
		date2.setYear(date2.getYear()+2000)
	}
	newMarkers(date1.getTime(),date2.getTime());
	if (document.getElementById("range").checked==true) {
		chart.setVisibleChartRange(date1,date2);
	}
};