function qryHowOld(varBirthDate) {

     var dtAsOfDate;
     var dtBirth;
     var dtAnniversary;
     var intSpan;
     var intYears;
     var intMonths;
     var intWeeks;
     var intDays;
     var intHours;
     var intMinutes;
     var intSeconds;
     var strHowOld;

	 var tab = varBirthDate.split('/');

	 varAsOfDate = new Date();

     // get born date
     dtBirth = new Date(tab[2], tab[1], tab[0]);
     
     // get as of date
     dtAsOfDate = new Date(varAsOfDate.getUTCFullYear(), varAsOfDate.getUTCMonth(), varAsOfDate.getUTCDate());
  
     // if as of date is on or after born date
     if ( dtAsOfDate >= dtBirth )
        {
  
        // get time span between as of time and birth time
        intSpan = ( dtAsOfDate.getUTCHours() * 3600000 +
                    dtAsOfDate.getUTCMinutes() * 60000 +
                    dtAsOfDate.getUTCSeconds() * 1000    ) -
                  ( dtBirth.getUTCHours() * 3600000 +
                    dtBirth.getUTCMinutes() * 60000 +
                    dtBirth.getUTCSeconds() * 1000       )
  
        // start at as of date and look backwards for anniversary 
  
        // if as of day (date) is after birth day (date) or
        //    as of day (date) is birth day (date) and
        //    as of time is on or after birth time
        if ( dtAsOfDate.getUTCDate() > dtBirth.getUTCDate() ||
             ( dtAsOfDate.getUTCDate() == dtBirth.getUTCDate() && intSpan >= 0 ) )
           {
  
           // most recent day (date) anniversary is in as of month
           dtAnniversary = 
              new Date( Date.UTC( dtAsOfDate.getUTCFullYear(),
                                  dtAsOfDate.getUTCMonth(),
                                  dtBirth.getUTCDate(),
                                  dtBirth.getUTCHours(),
                                  dtBirth.getUTCMinutes(),
                                  dtBirth.getUTCSeconds() ) );
  
           }
  
        // if as of day (date) is before birth day (date) or
        //    as of day (date) is birth day (date) and
        //    as of time is before birth time
        else
           {
  
           // most recent day (date) anniversary is in month before as of month
           dtAnniversary = 
              new Date( Date.UTC( dtAsOfDate.getUTCFullYear(),
                                  dtAsOfDate.getUTCMonth() - 1,
                                  dtBirth.getUTCDate(),
                                  dtBirth.getUTCHours(),
                                  dtBirth.getUTCMinutes(),
                                  dtBirth.getUTCSeconds() ) );
  
           // get previous month
           intMonths = dtAsOfDate.getUTCMonth() - 1;
           if ( intMonths == -1 )
              intMonths = 11;
  
           // while month is not what it is supposed to be (it will be higher)
           while ( dtAnniversary.getUTCMonth() != intMonths )
  
              // move back one day
              dtAnniversary.setUTCDate( dtAnniversary.getUTCDate() - 1 );
  
           }
  
        // if anniversary month is on or after birth month
        if ( dtAnniversary.getUTCMonth() >= dtBirth.getUTCMonth() )
           {
  
           // months elapsed is anniversary month - birth month
           intMonths = dtAnniversary.getUTCMonth() - dtBirth.getUTCMonth();
  
           // years elapsed is anniversary year - birth year
           intYears = dtAnniversary.getUTCFullYear() - dtBirth.getUTCFullYear();
  
           }
  
        // if birth month is after anniversary month
        else
           {
  
           // months elapsed is months left in birth year + anniversary month
           intMonths = (11 - dtBirth.getUTCMonth()) + dtAnniversary.getUTCMonth() + 1;
  
           // years elapsed is year before anniversary year - birth year
           intYears = (dtAnniversary.getUTCFullYear() - 1) - dtBirth.getUTCFullYear();
  
           }
  
        // to calculate weeks, days, hours, minutes and seconds
        // we can take the difference from anniversary date and as of date
  
        // get time span between two dates in milliseconds
        intSpan = dtAsOfDate - dtAnniversary;
  
        // get number of weeks
        intWeeks = Math.floor(intSpan / 604800000);
  
        // subtract weeks from time span
        intSpan = intSpan - (intWeeks * 604800000);
        
        // get number of days
        intDays = Math.floor(intSpan / 86400000);
  
        // subtract days from time span
        intSpan = intSpan - (intDays * 86400000);
  
        // get number of hours
        intHours = Math.floor(intSpan / 3600000);
      
        // subtract hours from time span
        intSpan = intSpan - (intHours * 3600000);
  
        // get number of minutes
        intMinutes = Math.floor(intSpan / 60000);
  
        // subtract minutes from time span
        intSpan = intSpan - (intMinutes * 60000);
  
        // get number of seconds
        intSeconds = Math.floor(intSpan / 1000);
  
        // create output string    
		strHowOld = intYears.toString();
         /*if ( intYears > 0 )
           if ( intYears > 1 )
              strHowOld = intYears.toString() + ' Years';
           else
              strHowOld = intYears.toString() + ' Year';
        else
           strHowOld = '';
 
        if ( intMonths > 0 )
           if ( intMonths > 1 )
              strHowOld = strHowOld + ' ' + intMonths.toString() + ' Months';
           else
              strHowOld = strHowOld + ' ' + intMonths.toString() + ' Month';
             
        if ( intWeeks > 0 )
           if ( intWeeks > 1 )
              strHowOld = strHowOld + ' ' + intWeeks.toString() + ' Weeks';
           else
              strHowOld = strHowOld + ' ' + intWeeks.toString() + ' Week';
  
        if ( intDays > 0 )
           if ( intDays > 1 )
              strHowOld = strHowOld + ' ' + intDays.toString() + ' Days';
           else
              strHowOld = strHowOld + ' ' + intDays.toString() + ' Day';
  
        if ( intHours > 0 )
           if ( intHours > 1 )
              strHowOld = strHowOld + ' ' + intHours.toString() + ' Hours';
           else
              strHowOld = strHowOld + ' ' + intHours.toString() + ' Hour';
   
        if ( intMinutes > 0 )
           if ( intMinutes > 1 )
              strHowOld = strHowOld + ' ' + intMinutes.toString() + ' Minutes';
           else
              strHowOld = strHowOld + ' ' + intMinutes.toString() + ' Minute';
  
        if ( intSeconds > 0 )
           if ( intSeconds > 1 )
              strHowOld = strHowOld + ' ' + intSeconds.toString() + ' Seconds';
           else
              strHowOld = strHowOld + ' ' + intSeconds.toString() + ' Second';
  */
        }
     else
        strHowOld = '0';
  
     // return string representation
		return strHowOld;
}