how do I reference an uploaded post image using code?

Thanks
I found the following code but it returns every image from the gallery and not ONLY THE IMAGE attached to the current post. This is my code below. I want to return only the image assiciated with the current post in the loop.Basically the below prints an excerpt and am triying to extract the attached image to be like a thumbnail. Any help please?

<?php $excerpt = get_the_excerpt();
            echo $excerpt; ?>   

<?php $thumbnailimages =& get_children( 'post_type=attachment&post_mime_type=image' );

                if ( empty($thumbnailimages) ) {
                  // no attachments here
                } else {

                  foreach ( $thumbnailimages as $attachment_id => $attachment ) {
                    echo wp_get_attachment_image( $attachment_id, 'full' );
                  }
                }
          ?>

Thanks for your response. Am a bit lost with all this tech. talk 🙂 I’d really appreaciate if you could help further. I have inserted my full archive.php here hoping you could help. Currently this file lists the excerpts. I just need to insert a thumbnail of the attached images using the above or other means. Thanks.

<?php get_header(); ?>
<?php get_sidebar(); ?>
<div class="archive2">
  <?php $odd_or_even = 'odd'; ?>
  <?php if (have_posts()) : ?>
  <?php while (have_posts()) : the_post(); // check for product large image
$pli = get_post_meta($post->ID, 'pli', $single = true); // check for item price
$price = get_post_meta($post->ID, 'price', $single = true);
 ?>
  <div class="post-<?php echo $odd_or_even; ?>" id="post-<?php the_ID(); ?>">
    <?php $odd_or_even = ('odd'==$odd_or_even) ? 'even' : 'odd'; ?>
    <div class="col1">
      <h2><a href="<?php the_permalink() ?>" rel="bookmark" title="<?php echo THEME_PERMANENT_LINK; ?><?php the_title_attribute(); ?>">
        <?php the_title(); ?>
        </a></h2>

<!-- THIS IS THE EXCERPT HERE -->

            <?php $excerpt = strip_tags(get_the_excerpt());
            echo $excerpt; ?>           

      <p><img src="<?php bloginfo('template_directory'); ?>/imgs/page.png" alt="<?php echo THEME_CATEGORIES; ?>" /> <strong><?php echo THEME_CATEGORIES; ?></strong>
        <?php the_category(' '); ?>
      <p>
      <p><img src="<?php bloginfo('template_directory'); ?>/imgs/tag.png" alt="<?php echo THEME_TAGS; ?>" /> <strong><?php echo THEME_TAGS; ?></strong>
        <?php the_tags(' '); ?>
      <p>
    </div>

    <div style="clear: both"></div>
  </div>
  <?php endwhile; ?>
  <div class="navigation">
    <div class="left">
      <?php next_posts_link(THEME_POST_ENTRIES_PREV) ?>
    </div>
    <div class="right">
      <?php previous_posts_link(THEME_POST_ENTRIES_NEXT) ?>
    </div>
  </div>
  <?php else : ?>
  <h2 class="center"><?php echo THEME_POST_NOT_FOUND; ?></h2>
  <p class="center"><?php echo THEME_POST_NOT_FOUND_MSG; ?></p>
  <?php include (TEMPLATEPATH . "/searchform.php"); ?>
  <?php endif; ?>
</div>

<?php get_footer(); ?>

it worked perfectly! Thanks very much!

I added a <div> around the image to enable me add a float:left CSS. Its showing OK except a few images are not coming up. Dont know why but am ok with this result.

How do I scale all the images to say a uniform 120×120. Is ther any way to do this in CSS? I have tried the width and height statements. They dont work.

Thanks.