// JScript File
function IsDate (month ,day ,year) 
{
    // month argument must be in the range 1 - 12
    month = month - 1; // javascript month range : 0- 11
    var tempDate = new Date(year ,month ,day);
    var tempYear = (tempDate.getYear() < 1000) ? tempDate.getYear() + 1900 : tempDate.getYear();
    if ( (tempYear == year)
    && (month == tempDate.getMonth())
    && (day == tempDate.getDate()) )
    {
        return true;
    }
    else
    {
        return false;
    }
}