jquery - How to get first date and last date of month view -

for first instance, question looks duplicate not!

i trying find first , last date of given month in calendar.(shown in attached image yellow highlighted)

example: in attached image

input : month july

result :

     first date:28th june 2015       last date: 8th august 2015 

i tried below code

   var days = ['sunday','monday','tuesday','wednesday','thursday','friday','saturday'],        months = ['jan','feb','mar','apr','may','jun','jul','aug','sept','oct','nov','dec'];          date.prototype.getmonthname = function() {              return months[this.getmonth()];            };          date.prototype.getdayname = function() {              return days[this.getday()];            };          date.prototype.getpreviousdate = function(beforedays) {            if (!days) { beforedays = 0 }                return new date(new date().setdate(this.getdate() -  beforedays));            }        var date = new date();       var firstday = new date(date.getfullyear(), date.getmonth(), 1);       var lastday = new date(date.getfullyear(), date.getmonth() + 1, 0);       var startdate = firstday.getpreviousdate(3);//hard coded       alert(startdate) // //this gives 28th june 2015 

jsfiddle works, here have hard coded value "3", want dynamically.

help appreciated.

solution

           getfirstvisibleday: function(date){                var firstday = 0;                var firstvisibleday = new date(date.getfullyear(), date.getmonth(), 0, date.gethours(), date.getminutes(), date.getseconds(), date.getmilliseconds());                 while (firstvisibleday.getday() != firstday) {                    kendo.date.settime(firstvisibleday, -1 * 86400000);                }                return firstvisibleday;            },