javascript - How to check if days between two dates are weekdays? -

i have form user take 2 dates calendar. want check if days between 2 dates user selected in friday monday (include).

i found script count weekdays (days include satuday , sunday):

function calcbusinessdays (ddate1, ddate2) {     var iweeks, idatediff, iadjust = 0;      if (ddate2 < ddate1) return 0;      var iweekday1 = ddate1.getday();     var iweekday2 = ddate2.getday();      iweekday1 = (iweekday1 == 0) ? 7 : iweekday1; // change sunday 0 7     iweekday2 = (iweekday2 == 0) ? 7 : iweekday2;      if ((iweekday1 > 5) && (iweekday2 > 5)) iadjust = 1; // adjustment if both days on weekend      iweekday1 = (iweekday1 > 5) ? 5 : iweekday1; // count weekdays     iweekday2 = (iweekday2 > 5) ? 5 : iweekday2;      // calculate differnece in weeks (1000ms * 60sec * 60min * 24hrs * 7 days = 604800000)     iweeks = math.floor((ddate2.gettime() - ddate1.gettime()) / 604800000)      if (iweekday1 <= iweekday2) {         idatediff = (iweeks * 5) + (iweekday2 - iweekday1)     } else {         idatediff = ((iweeks + 1) * 5) - (iweekday1 - iweekday2)     }      idatediff -= iadjust // take account both days on weekend      return (idatediff + 1); // add 1 because dates inclusive } 

how modify include friday , monday?

just put real quick should work. had trouble understanding sample code. thought might work little better.

var calcbusinessdays = function (ddate1, ddate2) {     //we working time stamps     var = ddate1.gettime()     ,   = ddate2.gettime()     ,   tempdate = new date()     ,   count = 0;      //loop through each day between dates 86400000 = 1 day     for(var _from = from; _from < to; _from += 86400000){         //set day         tempdate.settime(_from);         //if weekend add 1 count         if ((tempdate.getday() <= 1) || (tempdate.getday() >= 5)) {             count++;         }     }      //return count =)     return count; } 

this add 1 friday, saturday, sunday , monday. line need changed if wanted other days if statement nested in loop.