uc_taxes - uc_taxes.js

Problem in uc_taxes.js when I disable street address 2 (at admin/store/settings/checkout/edit/fields), I get an undefined error for s_street2.length.

Quick fix:
1/ use String(s_street2).length instead of s_street2.length
2/ change var s_street2 = $("input[@name*=delivery_street2]").val(); to

var s_street2 = $("input[@name*=delivery_street2]").val();
if (!s_street2) {
  s_street2 = '';
}