Starting the Shopping Cart Form
Begin by adding the opening <html> and closing </html> tags inside the [-- DEFINE ShoppingCart --] and [-- END_DEFINE ShoppingCart --] tags. Also, the shopping cart uses JavaScript for some functions, so you must include the [-- SC_JAVASCRIPT extras --] tag inside <script> tags in the <head> section of the template.
The shopping cart is an HTML form. You must include the [-- SC_Form --] tag -- which produces the opening <form> tag with the necessary attributes -- near the top of the <body> section of the template, and you must put a </form> tag near the end.
The [-- ShopSiteMessages --] tag will produce any error messages, such as telling the customer that they must select a shipping option. It will not produce anything if there are no errors or messages for the customer.
Next: Shopping Cart Title, Header and Footer 
