Jquery弹出日历框

//弹出日历
<link rel="stylesheet" href="/eitp/styles/calendar-system.css"/>
<script type="text/javascript" src="<s:url  value='/scripts/cal/calendar.js' />"></script>
<script type="text/javascript" src="<s:url  value='/scripts/cal/calendar-en.js' />"></script>
<script type="text/javascript" src="<s:url  value='/scripts/cal/calShow.js' />"></script>
<input type="text" name="overTime"
   id="overTime"
   onfocus="calShow('overTime');"
   value="${overTime}"/><span style="color:red;">&nbsp;*</span>
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