Hi,
The state drop-down must replace your text box. It must have the "state" name.
After that, your drop-down have the name "address_state" and not "state". And there is a CSS rule which hide the entire tr line:
#hikashop_checkout_login_right_part .hikashop_registration_address_state_line, #hikashop_address_form_span_iframe .hikashop_address_address_state_line {
display: none;
}
That's why you don't see the drop-down and that's why the country drop-down generates a javascript error : the state drop-down doesn't have his right name.
Regards,