example:
<script language="JavaScript" type="text/javascript" src="js/CalendarPopup.js"></script>
<SCRIPT LANGUAGE="JavaScript">document.write(getCalendarStyles());</SCRIPT>
<SCRIPT LANGUAGE="JavaScript" ID="jscal1x">
var cal1x = new CalendarPopup("testdiv1");
</SCRIPT>
<INPUT TYPE="text" NAME="date1x" id="date1x" VALUE="" SIZE=25>
<div id="testdiv1" style="position:absolute;"></div>
<A HREF="#" onClick="cal1x.select(document.all.date1x,'anchor1x','yyyy-MM-dd'); return false;" NAME="anchor1x" id="anchor1x">select</A>
<INPUT TYPE="text" NAME="date1x2" id="date1x2" VALUE="" SIZE=25>
<div id="testdiv12" style="position:absolute;"></div>
<A HREF="#" onClick="cal1x.select(document.all.date1x2,'anchor1x2','yyyy-MM-dd'); return false;" NAME="anchor1x2" id="anchor1x2">select</A>
