How to disable past and future week end dates in ajax calendar extender control in ASP.NET

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ASP.NET

Ajax

Dear all,

I do have a requirement that to disable previous and coming week end dates[saturday and sunday] with in ajax calendar extender control of asp.net. i've tried with many web links answers through net, but unable to get the exact output. if anyone knows any information regarding my requirement please share your views or corresponding code.

Note:- i want this functionality only with ajax calendar extender control not with asp calendar control.




but didn't able to get the output, and it shows an error like "length of undefined.."
and i also want to disable previous dates..please help me to solve this.
Thanks in advance.

What I have tried:

i've tried using following code to disable week ends.
=======================================================

<asp:Textbox id="txtDate" runat="server"/>
<asp:ImageButton id="Imgbtn" runat="server" imageurl="images/calendar.jpg"/>
<ajax:calendarExtender id="DisabledWeekendsCalendar"  runat="server" popupbuttonid="Imgbtn" TargetControlId="txtDate" />

My Javascript function:-
=========================

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 + "_0") {
        sender._days.all[i].disabled = true;
      }

      if (sender._days.all[i].id == "DisabledWeekendsCalendar" + j + "_6") {
        sender._days.all[i].disabled = true;
      }
    }
  }
}