Is it possible to use this plugin with the cart: http://wordpress.org/extend/plugins/ajaxize/
Some info from the setting page below:
Generate Ajaxized DIV for your function
Ajaxize will allow you to ajaxize almost any php function on your site.
It can be a plugin, a function you wrote, or even a core wordpress function.
IMPORTANT
There are some (obvious or less obvious) limitations currently:
Functions must return valid HTML - this will be called in php and returned via the Ajax call
Functions cannot accept any parameters (at least at the moment)The only setting is the following:
Enter a function name below: (What do I put in there?)
Then: Generate DIV
Is it possible to make use of the shortcode: [wp_eStore_add_to_cart id=the_id] ?