Hide Saturday and Sunday in a AJAx caledar

My Html Code is:

 ID="CalendarExtender1" runat="server" Format="dd/MM/yy" PopupButtonID="ImageButton1" PopupPosition="BottomRight" Enabled="true" OnClientDateSelectionChanged="DisableWeekends" TargetControlID="txtStartDate">  onclientshown=`"DisableWeekends"

The function is give below:

function DisableWeekends(sender, args) { for (var i = 0; i < sender._days.all.length; i++) { for (var j = 0; j < 6; j++) { if (sender._days.all[i].id == "DisabledWeekendsCalendar" + j + "_5") {         sender._days.all[i].disabled = true;         sender._days.all[i].innerHTML = "
" + sender._days.all[i].innerText + "
"; } if (sender._days.all[i].id == "DisabledWeekendsCalendar" + j + "_6") {         sender._days.all[i].disabled = true;         sender._days.all[i].innerHTML = "
" + sender._days.all[i].innerText + "
"; } } } }