var updateDepart = 'yes';

function dateYear(mDate){
	return mDate.getFullYear()
}

function dateMonth(mDate){
	return mDate.getMonth()
}

function getDateFromField(mField){
	return new Date(mField.value)
}

function updateDepartDate(){
	var months = ["January", "February", "March", "April", "May", "June","July", "August", "September", "October", "November", "December"];
	if(updateDepart == 'yes'){
		var newDate = addDays(new Date(this.document.MForm.arriveDate.value), 3);
		this.document.MForm.departDate.value = months[newDate.getMonth()] + ' ' + newDate.getDate() + ', ' + newDate.getFullYear();
		updateDepart = 'no'
	}
}

function addDays(myDate,days) {
    return new Date(myDate.getTime() + days*24*60*60*1000);
}