disable past dates on datepicker

Question

How to disable past dates from the current date on a datetimepicker? I tried few posts for similar question but was unable to achieve it, Below is what I tried

Answer 1

Problem fixed :)

below is the working code

$(function(){
    $('#datepicker').datepicker({
        startDate: '-0m'
        //endDate: '+2d'
    }).on('changeDate', function(ev){
        $('#sDate1').text($('#datepicker').data('date'));
        $('#datepicker').datepicker('hide');
    });

})