ASP.NET

<ajaxToolkit:CalendarExtender ID="clnSalaryMonth" runat="server" TargetControlID="txtSalaryMonth" Format="Y" BehaviorID="calendar1" 
PopupButtonID="imgSalarymonth"  OnClientShown="onCalendarSalShown" OnClientHidden="onCalendarSalHidden" />

function onCalendarSalShown()
{
    var cal = $find("calendar1");
    //Setting the default mode to month
    cal._switchMode("months", true);
    //Iterate every month Item and attach click event to it
    if (cal._monthsBody)
    {
        for (var i = 0; i < cal._monthsBody.rows.length; i++)
        {
            var row = cal._monthsBody.rows[i];
            for (var j = 0; j < row.cells.length; j++)
            {
                Sys.UI.DomEvent.addHandler(row.cells[j].firstChild, "click", callSal);
            }
        }
    }
}

function onCalendarSalHidden()
 {
    var cal = $find("calendar1");
    //Iterate every month Item and remove click event from it
    if (cal._monthsBody)
    {
        for (var i = 0; i < cal._monthsBody.rows.length; i++)
        {
            var row = cal._monthsBody.rows[i];
            for (var j = 0; j < row.cells.length; j++)
            {
                Sys.UI.DomEvent.removeHandler(row.cells[j].firstChild, "click", callSal);
            }
        }
    }
}

function callSal(eventElement)
{
    var target = eventElement.target;
    switch (target.mode)
    {
        case "month":
            var cal = $find("calendar1");
            cal._visibleDate = target.date;
            cal.set_selectedDate(target.date);
            cal._switchMonth(target.date);
            cal._blur.post(true);
            cal.raiseDateSelectionChanged();
            break;
    }
}

Response.Redirect("~/Detail.aspx");

Response.Redirect("~/Detail.aspx", false);

Response.Redirect("~/Detail.aspx");