title: Magento Onepage checkout error: Uncaught TypeError: Cannot read property 'style' of null
body: <p>Does anyone know what is causing this error in Magento Onepage Checkout?</p>
  
  <p>I can't progress to the billing step when I click continue:</p>
  
  <p>'Uncaught TypeError: Cannot read property 'style' of null ' </p>
  
  <p>Shows in the error console.</p>
  
  <p>I am using the default theme on the frontend but have a custom template for another store which doesn't have this issue.</p>
  
  <p>I've searched and searched but cannot find a solution other than reinstall...</p>
  
  <p>Can someone assist me please?</p>