DOB select boxes on Magento customer registration form

<?php echo $this->getLayout()->createBlock('customer/widget_dob')

   ->setDate($this->getCustomer()->getDob())

   ->toHtml() ?>

For checkout/onepage/billing.phtml:

<?php echo $this->getLayout()->createBlock('customer/widget_dob')

   ->setDate($this->getCustomer()->getDob())

   ->setFieldIdFormat('billing:%s')

   ->setFieldNameFormat('billing[%s]')

   ->toHtml() ?>

NOTE: Regarding styles - if we leave it this way, we'll move it to boxes.css

      Alternatively we could calculate widths automatically using block input parameters.

*/

/**

 * @see Mage_Customer_Block_Widget_Dob

 */

?>

<label for="<?php echo $this->getFieldId('month')?>"<?php if ($this->isRequired()) echo ' class="required"' ?>><?php if ($this->isRequired()) echo '<em>*</em>' ?><?php echo $this->__('Date of Birth') ?></label>

<div class="input-box customer-dob">

<?php

    $this->setDateInput('d',

        '<div class="dob-day">

             <input type="text" id="' . $this->getFieldId('day') . '" name="' . $this->getFieldName('day') . '" value="' . $this->getDay() . '" title="' . $this->__('Day') . '" class="input-text validate-custom" ' . $this->getFieldParams() . '  />

             <label for="' . $this->getFieldId('day') . '">' . $this->__('DD') . '</label>

         </div>'

    );?>

<select name="nday" id="nday" onchange="getElementById(<?php echo $this->getFieldId('day');?>).value=this.value" style="width:90px;">

<option value="">Select</option>

<?php

for($i=1;$i<=31;$i++)

{

echo "<option value='".$i."'>".$i."</option>";

}

?>

</select>

<select name="nmon" id="nmon" onchange="getElementById(<?php echo $this->getFieldId('month');?>).value=this.value" style="width:90px;">

<option value=''>Select</option>

<?php echo '<option value="">'.$this->__("Select").'</option>'.'<option value="01">'.$this->__("January").'</option>'.'<option value="02">'.$this->__("February").'</option>'.'<option value="03">'.$this->__("March").'</option>'.'<option value="04">'.$this->__("April").'</option>'.'<option value="05">'.$this->__("May").'</option>'.'<option value="06">'.$this->__("June").'</option>'.'<option value="07">'.$this->__("July").'</option>'.'<option value="08">'.$this->__("August").'</option>'.'<option value="09">'.$this->__("September").'</option>'.'<option value="10">'.$this->__("October").'</option>'.'<option value="11">'.$this->__("November").'</option>'.'<option value="12">'.$this->__("December").'</option>'; ?>

</select>

<select name="nyear" id="nyear" onchange="getElementById(<?php echo $this->getFieldId('year'); ?>).value=this.value" style="width:90px;">

<option value="">Select</option>

<?php

for($j=date('Y')-80;$j<=date('Y');$j++)

{

echo "<option value='".$j."'>".$j."</option>";

}

?>

</select>

</p>

<?php

    $this->setDateInput('m',

        '<div class="dob-month">

             <input type="text" id="' . $this->getFieldId('month') . '" name="' . $this->getFieldName('month') . '" value="' . $this->getMonth()  . '" title="' . $this->__('Month')  . '" class="input-text validate-custom" ' . $this->getFieldParams()  . '/>

             <label for="' . $this->getFieldId('month') . '">' . $this->__('MM')  . '</label>

         </div>'

    );

    $this->setDateInput('y',

        '<div class="dob-year">

             <input type="text" id="' . $this->getFieldId('year') . '" name="' . $this->getFieldName('year') . '" value="' . $this->getYear()  . '" title="' . $this->__('Year')  . '" class="input-text validate-custom" ' . $this->getFieldParams()  . ' />

             <label for="' . $this->getFieldId('year') . '">' . $this->__('YYYY')  . '</label>

         </div>'

    );

?>

 <?php echo $this->getSortedDateInputs() ?>

    <div class="dob-full" style="display:none;">

        <input type="hidden" id="<?php echo $this->getFieldId('dob')?>" name="<?php echo $this->getFieldName('dob')?>" />

    </div>

    <div class="validation-advice" style="display:none;"></div>

</div>

<script type="text/javascript">

//<![CDATA[

    var customer_dob = new Varien.DOB('.customer-dob', <?php echo $this->isRequired() ? 'true' : 'false' ?>, '<?php echo $this->getDateFormat() ?>');

//]]>

</script>