Prevent Shipping To Po Box?

Store Builder Questions
1

In version 2 on cs cart someone did it. Here is link

http://forum.cs-cart.com/topic/16421-prevent-shipping-to-po-box-how-to/

I was hoping this version can do it.

2

Magento has it. there has to be away to do it.

3

Did you try the mentioned code on 4.x version? It does not look like too complex changes are required to adapt it to the current core.js file

4

Where is the core js file located? Never mind I found it

5

Ok not sure what the user data is for address. I seen this in profile_info.tpl

{include file="views/profiles/components/profile_fields_info.tpl" fields=$profile_fields.B title=__("billing_address")}

This line:
if(elm.attr("name") == "user_data[b_address]") {
would this be changed to:
if(elm.attr("name") == "profile_fields.B title=__("billing_address")) {
What I have so far:
 // Billing address first line
                      if(elm.attr("name") == "user_data[b_address]") {
                       if (lbl.hasClass('cm-required') || $.is.blank(elm.val()) == false) {
                                        if($('#sa').css('display') !== "block") {
                                                if(elm.val().indexOf( 'po box' ) !== -1 || elm.val().indexOf( 'PO Box' ) !== -1 || elm.val().indexOf( 'P.O. $
                                                                this.form_message("Cannot ship to a PO Box", lbl);
                                                                is_ok = false;
                                                                set_mark = true;
                                                }
                                        }
                                }
                        }

                 // Shipping address first line
                 if(elm.attr("name") == "user_data[s_address]") {
                 if (lbl.hasClass('cm-required') || $.is.blank(elm.val()) == false) {
                                            if(elm.val().indexOf( 'po box' ) !== -1 || elm.val().indexOf( 'PO Box' ) !== -1 || elm.val().indexOf( 'P.O. $
                                                            this.form_message("Cannot ship to a PO Box", lbl);
                                                            is_ok = false;
                                                            set_mark = true;
                                            }
                                    }
                            }

6

Where is the core js file located? Never mind I found it

Hello!

core.js file is located in the js/tygh/ folder.

7

What I have so far:

Does it work as required?

8

What u mean does it work as required? I tried it and does nothing not sure where to put this at in the core is file or maybe do I put it in checkout tpl file