https://www.provancher.org/wp-content/plugins/pmpro-group-accounts/js/pmprogroupacct-checkout.js?ver=1.6.1

1jQuery( document ).ready( function( $ ) {
2	// Check when the #pmprogroupacct_apply_group_code button is clicked.
3	$( '#pmprogroupacct_apply_group_code' ).click( function() {
4		// Get the group code.
5		var group_code = $( '#pmprogroupacct_group_code' ).val();
6
7		// If the group code is empty, do nothing.
8		if ( group_code == '' ) {
9			return;
10		}
11
12		// Get the current URL.
13		var url = window.location.href;
14
15		// Add the group code to the URL.
16		if ( url.indexOf( 'pmprogroupacct_group_code=' ) > 0 ) {
17			// If the URL already has a group code, replace it with the new group code.
18			url = url.replace( /pmprogroupacct_group_code=[^&]+/, 'pmprogroupacct_group_code=' + group_code );
19		} else if ( url.indexOf( '?' ) > 0 ) {
20			// If the URL already has a query string, append the group code to it.
21			url += '&pmprogroupacct_group_code=' + group_code;
22		} else {
23			// If the URL does not have a query string, add one with the group code.
24			url += '?pmprogroupacct_group_code=' + group_code;
25		}
26
27		// Redirect to the new URL.
28		window.location.replace( url );
29	} );
30} );