Need Help adding ctlSpiffyCalendarBox

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i added some codes to admin/orders.php and new fields to database,
now on the orders page in admin, i have an input field in order status update form, so i can enter a date and submit it to my database table,
it works nice with the code <?php echo zen_draw_input_field('my_date', '', 'size="40"'); ?>

what i want to do is to change zen_draw_input_field('my_date', '', 'size="40"') to a calendarbox, then i can select a date instead of typing a date.

so i tried adding the code

<link rel="stylesheet" type="text/css" href="includes/javascript/spiffyCal/spiffyCal_v2_1.css"> 
<script language="javascript" src="includes/javascript/spiffyCal/spiffyCal_v2_1.js"></script>  
<div id="spiffycalendar" class="text"></div>
<script language="javascript"> 
var StartDate = new ctlSpiffyCalendarBox("StartDate", "status", "my_date", "btnDate1","",scBTNMODE_CUSTOMBLUE); 
</script> 

then i replaced

zen_draw_input_field('my_date', '', 'size="40"') 

with the code below

<?php <script language="javascript">StartDate.writeControl(); StartDate.dateFormat="yyyy-MM-dd";</script> ?>

but when i click the calendarbox icon, nothing poupup

any help? thanks

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there's also a calendarbox on admin featured page,
but i don't know why it doesn't work on admin orders page with the code i added above

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117 views, any idea?

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