Conditional statement for background image on child pages

Hi,

I’m trying to use a conditional statement to change the background image of a div depending what page you are on. It works fine for the parent pages, but I can’t seem to get to it work for the child pages (first if statement). I’m sure there’s a better way to do this, maybe using an array, unfortunately my php knowledge is a bit lacking.

I want to say ‘all pages with a parent of ‘shop” have the same background image.

Any help greatly received.

<?php if ( is_page('shop') || $post->post_parent == 'tablewares'): ?>
<style type="text/css">
	#container {background-color:#685f56;background-image:url(/wp-content/themes/hedgehogtheme/images/background_jugs.jpg);background-repeat: no-repeat;}
	</style>

<?php elseif (is_page('home') ):
  // home ?>
	<style type="text/css">
	#container {background-color:#685f56;background-image:url(/wp-content/themes/hedgehogtheme/images/background_jugs.jpg);background-repeat: no-repeat;}
	</style>

<?php elseif (is_page('pottery') ):
	  // pottery ?>
	<style type="text/css">
	#container {background-color:#5a5454;background-image:url(/wp-content/themes/hedgehogtheme/images/background_candle.jpg);background-repeat:no-repeat;}
	</style>

<?php elseif (is_page('bespoke-ceramics') ):
	  // bespoke-ceramics ?>
	<style type="text/css">
	#container {background-color:#6f6258;background-image:url(/wp-content/themes/hedgehogtheme/images/background_jug.jpg);background-repeat:no-repeat;}
	</style>

<?php elseif (is_page('contact') ):
  // contact ?>
	<style type="text/css">
	#container {background-color:#564d48;background-image:url(/wp-content/themes/hedgehogtheme/images/background_bowl.jpg);background-repeat:no-repeat;}
	</style>

<?php elseif (is_page('about') ):
	  // about ?>
	<style type="text/css">
	#container {background-color:#6f6156;background-image:url(/wp-content/themes/hedgehogtheme/images/background_rings.jpg);background-repeat:no-repeat;}
	</style>

<?php endif; // end the if, no images for other other categories ?>

http://www.hedgehogceramics.co.uk/shop