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HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    
    <title>jQuery UI Datepicker - Display month &amp; year menus</title>
<link rel="stylesheet" href="http://redflowermedia.com/contest/css/themes/base/jquery.ui.all.css">
<link rel="stylesheet" href="http://redflowermedia.com/contest/css/demos.css">
    <script src="http://redflowermedia.com/contest/js/jquery-1.5.1.js"></script>
    <script src="http://redflowermedia.com/contest/js/ui/jquery.ui.core.js"></script>
    <script src="http://redflowermedia.com/contest/js/ui/jquery.ui.widget.js"></script>
    <script src="http://redflowermedia.com/contest/js/ui/jquery.ui.datepicker.js"></script>
    
    
    <script>
            var unavailableDates = ["5-7-2011","6-7-2011","7-7-2011","15-7-2011","16-7-2011","17-7-2011" ];
    function unavailable(date) {
  dmy = date.getDate() + "-" + (date.getMonth()+1) + "-" + date.getFullYear();
  if ($.inArray(dmy, unavailableDates) == -1) {
    return [true, ""];
  } else {
    return [false,"","Unavailable"];
  }
}
    //Function Declaration
    function str2date(sdate){ //This function gets a string and return a Date object
   var parts = sdate.split("-");
   return new Date(parts[2], parseInt(parts[1], 10)-1, parts[0]);
}
    

    $(function() {
        $( "#datepicker_1" ).datepicker({
             beforeShow: customRange,
            beforeShowDay: unavailable,
            changeMonth: true,
            changeYear: true,
            onClose: function() {
            $("#datepicker_2").datepicker("show");
        }
        });
    });
        $(function() {
        $( "#datepicker_2" ).datepicker({
             beforeShow: customRange,
            beforeShowDay: unavailable,
            changeMonth: true,
             onClose: function(dateText, inst)
             {
            //alert(dateText);
             var theDate = new Date(Date.parse($(this).datepicker('getDate')));
             var maxdate = $.datepicker.formatDate('d-m-yy', theDate);
var...