<link rel="stylesheet" type="text/css" href="../../codebase/dhtmlxcalendar.css">
    <link rel="stylesheet" type="text/css" href="../../codebase/skins/dhtmlxcalendar_dhx_skyblue.css">
    <script src="../../codebase/dhtmlxcommon.js"></script>
    <script src="../../codebase/dhtmlxcalendar.js"></script>
    <script src="../../codebase/ext/dhtmlxcalendar_double.js"></script>
    <script>
var myCalendar;
function doOnLoad() {
    myCalendar = new dhtmlXDoubleCalendar("calendarHere");
    myCalendar.setDateFormat("%Y-%m-%d");
    myCalendar.setDates("2012-08-07", "2012-08-23");
    myCalendar.show();
}</script>
 
 
    <div id="calendarHere" style="position:relative;height:250px;"></div>