<?php JHTML::_('behavior.calendar'); ?> 
<img class="calendar" src="templates/system/images/calendar.png" alt="calendar" id="btnNeededBy2" />
<script type="text/javascript">
var startDate = new Date(2011, 1, 1);
Calendar.setup({
inputField : "ff_elem223",
ifFormat : "%m/%d/%Y", 
button : "btnNeededBy2",
range : [2011,2100],
date : startDate
});
</script>