https://tampere2018.com/wp-content/plugins/contact-form-plugin/js/cntctfrm.js?ver=4.2.4

1(function($) {
2	$(document).ready( function() {
3		$(window).resize(function() {
4			$( '.cntctfrm_contact_form.cntctfrm_width_default.cntctfrm_two_columns' ).each( function() {
5				var $cntctfrm_form = $( this ),
6					$parent = $cntctfrm_form.parent(),
7					$cntctfrm_column = $cntctfrm_form.find( '.cntctfrm_column' ),
8					margin = 10,
9					min_column_width = 200,
10					max_column_width = 320,
11					min_form_width = min_column_width * 2 + margin,
12					max_form_width = max_column_width * 2 + margin;
13				if ( $parent.width() < max_form_width  ) {
14					var new_column_width = Math.floor( ( $parent.width() - margin ) / 2 );
15					if ( new_column_width * 2 + margin >= min_form_width ) {
16						$cntctfrm_column.css( 'max-width', new_column_width );
17					}
18				}
19			});
20		}).trigger( 'resize' );
21	});
22})(jQuery);