Answer Posted / syed ahmed jawwad

<!--- Include Jquery Script, source www.jquery.com--->
<select id="dayType" name="dayType" onchange="showFields()">
<option>Today</option>
<option>Yesterday</option>
<option>Last Week</option>
<option>Last Month</option>
<option>Voucher Number</option>
</select>
<input type="text" id="dateValue" name="dateValue">
<script type="text/javascript">
function showFields()
{
if(jQuery('#dayType').val()=='Today' ||
jQuery('#dayType').val()=='Yesterday')
{
jQuery('#dateValue').datepicker({changemonth:
true, changeyear: true, dateformat:'mm/dd/yy'});
}else jQuery('#dateValue').datepicker('destroy');
}
</script>

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