You would require some understanding of how the javascript works, but you should be able to modify this code to have the calender point to something other than the text field:
<script type="text/javascript">
$(function(){
$('#fieldset_group_field').datepicker({
changeMonth: true,
changeYear: true,
onClose: closeDatePicker_fieldset_group_field
});
});
function closeDatePicker_fieldset_group_field() {
var tElm = $('#fieldset_group_field');
if (typeof fieldset_group_field_Spry != null && typeof fieldset_group_field_Spry != "undefined") {
fieldset_group_field_Spry.validate();
}
var docElm = document.getElementById("fieldset_group_field");
var tBlur = docElm.getAttribute("onBlur");
if (!tBlur) tBlur = docElm.getAttribute("onblur");
if (!tBlur) tBlur = docElm.getAttribute("ONBLUR");
if (tBlur) {
tBlur = tBlur.replace(/\bthis\b/g, "docElm");
eval(tBlur);
}
}
</script>
This currently is pointing to a form element called fieldset_group_field. Unfortunately, since this is custom development, I cannot give you any additional support on how to accomplish this.