Hi Craig
Place the following script in the head of your document:
<script type="text/javascript">
function CopyValue(from, to){
document.getElementById(to).value = document.getElementById(from).value;
return true;
}
</script>
Then add this piece of code to the instance of your datepicker widget:
onblur="CopyValue('datepicker_1','datepicker_2')"
so that it would be like:
<input id="datepicker_1" name="datepicker_1" type="text" onblur="CopyValue('datepicker_1','datepicker_2')" />
Please replace "datepicker_1" and "datepicker_2" with the expressions, you use in your form.