$(function () {

$("#selectMonth, #selectYear").change(checkLinkedDays);
});

// Prepare to show a date picker linked to three select controls 
function readLinked() { 
    $('#linkedDates').val($('#selectMonth').val() + '/' + 
        $('#selectDay').val() + '/' + $('#selectYear').val()); 
    return {}; 
} 
 
// Update three select controls to match a date picker selection 
function updateLinked(date) { 
    $('#selectMonth').val(date.substring(0, 2)); 
    $('#selectDay').val(date.substring(3, 5)); 
    $('#selectYear').val(date.substring(6, 10)); 
} 
 
// Prevent selection of invalid dates through the select controls 
function checkLinkedDays() { 
	//alert("damu");
    var daysInMonth = 32 - new Date($('#selectYear').val(), 
        $('#selectMonth').val() - 1, 32).getDate(); 
    $('#selectDay option').attr('disabled', ''); 
    $('#selectDay option:gt(' + (daysInMonth - 1) +')').attr('disabled', 'disabled'); 
    if ($('#selectDay').val() > daysInMonth) { 
        $('#selectDay').val(daysInMonth); 
    } 
}