jquery datepicker onchange

Java code

function gettime(str) {                var strURL="/Doctor/booking/gettime.jsp?datepicker="+str;                var req = getXMLHTTP();                if (req) {                    req.onreadystatechange = function() {                        if (req.readyState == 4) {                            // only if "OK"                            if (req.status == 200) {                                document.getElementById('datepicker').innerHTML=req.responseText;                            } else {                                alert("There was a problem while using XMLHTTP:\n" + req.statusText);                            }                        }                    }                    req.open("GET", strURL, true);                    req.send(null);                }            }

Java code

<b>Date: <input type="text" id="datepicker" name="datepicker" readonly="true" onchange="gettime(this.value)"></b>$(document).ready(function() {        $(function() {            $( "#datepicker" ).datepicker({dateFormat: 'yy-mm-dd',                maxDate: '+1m',                minDate: 'Now',                beforeShowDay: noSundays            });        });    });    function noSundays(a) {   a=a.getDay();   return[a>0&&a<7,""]; }