Code Submission: Submit on dropdown select

Thanks for the great plugin its works really well. I am using it on a woocommerce install.

I was wondering if you could add an auto submit function so that after I select a choice from the dropdown it will automatically load the result instead of me havnig to click the button. The code is quite simple, here is what I did, you can probably make it betetr by adding a checkbox in the admin to choose if the user wnats thins feature…

In the latest version starting at line 90: The changes on each line are noted with a //<- comment

$args = array(
				'show_option_all'    => false,
				'show_option_none'   => ' ', // <- Added a space to make the first choice blank
				'orderby'            => $orderby,
				'order'              => $ascdsc,
				'show_count'         => $showcount,
				'hide_empty'         => 1,
				'child_of'           => $childof,
				'exclude'            => $exclude,
				'echo'               => 0, // <- dont output immediately so we can pare it later
				//'selected'           => 0,
				'hierarchical'       => $hierarchical,
				'name'               => $taxonomy_object->query_var,
				'id'                 => 'lct-widget-'.$tax,
				//'class'              => 'postform',
				'depth'              => 0,
				//'tab_index'          => 0,
				'taxonomy'           => $tax,
				'hide_if_empty'      => true,
				'walker'			=> new lctwidget_Taxonomy_Dropdown_Walker()
			);
			echo '<form action="'. get_bloginfo('url'). '" method="get">';
			$select = wp_dropdown_categories($args); //<- store in var
			$select = preg_replace("#<select([^>]*)>#", "<select$1 onchange='return this.form.submit()'>", $select); //<- add the javascript to submit on change
			echo $select;  //<- output the select
			//<-- hide the submit button echo '<input type="submit" value="go &raquo;" /></form>';
		}

https://www.ads-software.com/plugins/list-custom-taxonomy-widget/