Create WP_Taxonomy_Chained_Select_Function.php

SHORTCODE USAGE:
[WP_Taxonomy_Chained_Select taxonomy="your-taxonomy-slug" name="select name" id="CSS id" class="css class for parent dropdown" orderby="name|slug|id" order="ASC|DESC" hide_empty="true|false" show_option_none="text if no selection made" sel="selected option value"]

PHP FUNCTION USAGE:

	$args = array(
	    'show_option_none' 	=> $show_option_none,
	    'orderby'           => $orderby, 
	    'order'             => $order,
	    'name'              => $name,
	    'class'             => $class,
	    'id'              	=> $id,
	    'selected'		=> $sel,
	    'taxonomy'		=> $taxonomy,
	    'hide_empty'	=> $hide_empty
	);


WP_Taxonomy_Chained_Select_Function($atts);