var oneday = 1000 * 60 * 60 * 24;
        var fourteendays = oneday * 14;
        var td = new Date();

function find_ovulation_date() {

	d = parseInt(document.ovulate.d.value);
	m = parseInt(document.ovulate.m.value);
	y = parseInt(document.ovulate.y.value);
	c = parseInt(document.ovulate.c.value);
	td.setDate(d);
	td.setMonth(m-1);
	td.setYear(y);
	td.setTime(td.getTime() + ((c * oneday) - fourteendays));

	yr = td.getYear()+1900;
	month = td.getMonth()+1;
	date = td.getDate();
	if ((yr > 100) && (yr <1900))
		{yr = yr+1900}
	if (yr == 3900)
		{yr = 2000}
	month = td.getMonth()+1;
	date = td.getDate();
	date_text = "" +month+ "/" +date+ "/" +yr;
		date_text2 = "" +month+ "/" +(date-5)+ "/" +yr;


document.ovulate.answer.value = date_text;

document.ovulate.answer2.value = date_text2+"  to  "+date_text;

}