自定义送货方式magento

Question

我想在结帐页面添加一个下拉菜单，其中包含选择时间和领取日期的选项。目前我在下拉列表中添加了送货方式我想添加提货日期和时间而不是它。

    <?php if (($_shippingRateGroups = $this->getEstimateRates())): ?>
<form id="co-shipping-method-form-drop" action="<?php echo $this->getUrl('checkout/cart/estimateUpdatePost') ?>">
    <select id='drop_estimate_method' name="estimate_method">
        <option value='-1'>Please Select Shipping Method</option>
        <?php 
        foreach ($_shippingRateGroups as $code => $_rates) { 
        $str = $this->getCarrierName($code);
        foreach ($_rates as $_rate){ 
            $str2 = $str . ' - ' . $_rate->getMethodTitle();

            $_excl = $this->getShippingPrice($_rate->getPrice(), $this->helper('tax')->displayShippingPriceIncludingTax());
            $_incl = $this->getShippingPrice($_rate->getPrice(), true);
            $str2 .= ' ['. $_excl;
            if ($this->helper('tax')->displayShippingBothPrices() && $_incl != $_excl) { 
                $str2 .= ' '. $this->__('Incl. Tax'); echo $_incl;
            }
            $str2 .= '] ';
        ?>
        <option <?php if($_rate->getCode()===$this->getAddressShippingMethod()) echo ' selected="selected"' ?> value="<?php echo $this->htmlEscape($_rate->getCode()) ?>"><?php echo $str2;?></option>

        <?php } 
        } ?>
    </select>
</form>
<script type="text/javascript">
    document.observe("dom:loaded", function() {
        $('drop_estimate_method').observe('change',function(){
            if($('drop_estimate_method').getValue() == -1){
                alert('Please Select Shipping Method');
            }else{
                $('co-shipping-method-form-drop').submit();
            }
        });
    });
</script>
<?php endif; ?>