One Page Checkout Issue - Billing is not defined - onepage:1772

Question

I have a problem with my one page checkout in my Magento 1.7.0.2 store. The store is not yet launched so all products are demo, but I can't seem to solve this issue. At page load I get

ReferenceError: billing is not defined @ line 1772

It's inline javascript. Here is the troublesome code below:

billing.onSave = function(evt){
    new Ajax.Updater('onepage-checkout-shipping-method-additional-load', 'http://purchaseblack.com/checkout/onepage/getAdditional/', {onSuccess: function() {
          this.nextStep(evt);
    }.bind(this), evalScripts:true});
}.bindAsEventListener(billing);

}

When I then use this page, nothing else related to finishing the checkout process works, and I get more, new errors. My question is this:

How do I define billing? What file(s) do I need to edit to ensure that billing is defined properly and permanently?

Hopefully, this is the root of the other errors, and I can move on to the next set of issues.

This is my first post and I am pretty new, so bear with me here. If there is any info I can provide to help you help me, let me know.

Answer 1

You are missing the inline javascript code that defines the billing variable. Compare the billing.phtml files in your current theme against the ones in:

app\design\frontend\base\default\template\checkout\onepage\billing.phtml

app\design\frontend\base\default\template\persistent\checkout\onepage\billing.phtml

You should see similar to below:

<script type="text/javascript">
//<![CDATA[
    var billing = new Billing('co-billing-form', '<?php echo $this->getUrl('checkout/onepage/getAddress') ?>address/', '<?php echo $this->getUrl('checkout/onepage/saveBilling') ?>');
    var billingForm = new VarienForm('co-billing-form');

    //billingForm.setElementsRelation('billing:country_id', 'billing:region', '<?php echo $this->getUrl('directory/json/childRegion') ?>', '<?php echo $this->__('Select State/Province...') ?>');
    $('billing-address-select') && billing.newAddress(!$('billing-address-select').value);

    var billingRegionUpdater = new RegionUpdater('billing:country_id', 'billing:region', 'billing:region_id', <?php echo $this->helper('directory')->getRegionJson() ?>, undefined, 'billing:postcode');
//]]>
</script>