function getBirthday() {
DAYS_TO_MILLISEC = 24 * 60 * 60 * 1000;
GEST_EARLY = 315 * DAYS_TO_MILLISEC;
GEST_LATE = 365 * DAYS_TO_MILLISEC;
GEST_AVERAGE = 341 * DAYS_TO_MILLISEC;
concMonth = document.getElementById("month").value-1;
concDay = document.getElementById("day").value;
concYear = document.getElementById("year").value;
if (concMonth > 11 || concMonth < 0) {
alert("Month is out of range!");
return false;
}
if (concDay > 31 || concDay < 1) {
alert("Day is out of range!");
return false;
}
if (concYear < 10) {
concYear = 2000 + parseInt(concYear);
}
concDate = new Date(concYear, concMonth, concDay);
// alert(concMonth + "/" + concDay + "/" + concYear + " = " + concDate.toString());
dates = new Object;
dates.expectedDate = new Date(concDate.valueOf()+GEST_AVERAGE);
dates.earliestDate = new Date(concDate.valueOf()+GEST_EARLY);
dates.latestDate = new Date(concDate.valueOf()+GEST_LATE);
return dates;
}
function alertBD() {
if (dates = getBirthday()) {
htmlMsg = "Foaling Due Date";
htmlMsg += "";
htmlMsg += "
Your foal is due on, ";
htmlMsg += (dates.expectedDate.getMonth()+1) + "/" + dates.expectedDate.getDate() + "/" + dates.expectedDate.getYear();
htmlMsg += ".