function validate_date(value)
{
var arrD = value.split(".");
arrD[1] -= 1;
var d = new Date(arrD[2], arrD[1], arrD[0]);
if ((d.getFullYear() == arrD[2]) && (d.getMonth() == arrD[1]) && (d.getDate() == arrD[0])) {
return true;
} else {
return false;
}
}
validate_date('31.12.2018')