function number_of_days(syear,smonth,sdate,eyear,emonth,edate)
{
    var start_date =new Date(syear, smonth, sdate);
    var end_date =new Date(eyear, emonth, edate);
    var one_day=1000*60*60*24;
    var no_of_day = Math.ceil((end_date.getTime()-start_date.getTime())/(one_day));
    if (no_of_day >= 0)
    {
        if (no_of_day == 0)
            no_of_day = eval(no_of_day+1);
        return(no_of_day);
    }
    else
    return(0);
}