How to change the header background or image in header file

HI.. this is the perfect code to change the images in the header for different pages

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<?php if(is_home()|| is_front_page()) { $image='your_image.jpg'; }
                        else { $image='another_image.jpg'; }
                        echo '<img src="'.get_bloginfo('template_url').'/images/'.$image.'" alt="" />'; ?>

and this is the perfect code to change the background image of the div

<?php if(is_home() || is_front_page()) { ?>
                        <style type="text/css">
                .header_image {
                    background-image:url(<?php echo get_template_directory_uri(); ?>/images/Airport_Taxi_Oakville.jpg);background-repeat:no-repeat;
                }
                    </style>

            <?php } else { ?>
                     <style type="text/css">
                        .header_image {background-image:url(<?php echo get_template_directory_uri(); ?>/images/inside_img1.jpg);background-repeat:no-repeat;}
                    </style>
            <?php } ?>