function lastModDat(a,b,c)
{
this.rok=a;
this.mesiac=b-1;  //Month is 0-11 in JavaScript
this.den=c;

//  Set the two dates
var startingdate=new Date(rok, mesiac, den)
var today=new Date()
//  1 day in milliseconds 86400000=1000*60*60*24
var one_day= 86400000

//Calculate difference btw the two dates, and convert to days
daysago=Math.floor((today.getTime()-startingdate.getTime())/(one_day));

    if (daysago < 0) return '';
    unit = 'days';
    if (daysago > 730)  {
        daysago = Math.floor(daysago/365);
        unit = 'years';
    }
    else if (daysago > 60) {
        daysago = Math.floor(daysago/30);
        unit = 'months';
    }
    else if (daysago > 14) {
        daysago = Math.floor(daysago/7);
        unit = 'weeks'
    }

    prevod(rok,mesiac+1,den);
    var towrite ="&nbsp;&nbsp;" + "(";
    if (daysago == 0) towrite += 'today)';
    else if (daysago == 1) towrite += 'yesterday)';
    else towrite += daysago + ' ' + unit + ' ago)';
    return towrite;
}