$(document).ready(function(){
	var box_origin = '#box_origin' ;
	var box_copy   = '#box_copy' ;

	if( $( box_origin ).height() < $( box_copy ).height() ){
		$( box_origin ).height( $( box_copy ).height() ) ;
	} else {
		$( box_copy ).height( $( box_origin ).height() ) ;
	}
}) ;