Wordpress: Page with child pages List

gistfile1.txt

/* Page with child pages List */
function imediapixel_pagelist($page_name, $num, $orderby="menu_order",$style="2col") {  
  global $post;
  
  $page_id = get_page_by_title($page_name);
  
  $services_num = ($num) ? $num : 4;
  $counter = 0;
  $out = "";
  
   if ($style == "4col") $out .= '<div class="clear"></div><ul class="portfolio-4col">';
   
  query_posts('post_type=page&post_parent='.$page_id->ID.'&showposts='.$services_num.'&orderby='.$orderby);
    
  while (have_posts()) : the_post();
    $counter++;
    
    if ($style == "2col") {
      if ($counter %2 ==0) {
        $out .= '<div class="mainbox box-last">'; 
      } else {
        $out .= '<div class="mainbox">';
      }
      $out .= '<h4><a href="'.get_permalink().'">'.get_the_title().'</a></h4>';
      $out .= '<div class="boximg">';
      if (function_exists('has_post_thumbnail') && has_post_thumbnail()) {
        $out .= '<img src="'.get_template_directory_uri().'/timthumb.php?src='.thumb_url().'&amp;h=84&amp;w=84&amp;zc=1" alt="" class="boximg-pad" />'."\n";
      }
      $out .= '</div>';
      $out .= '<p>'.excerpt(25).'</p>';
      $out .= '<a href="'.get_permalink().'" class="button"><span>'.__('VIEW MORE DETAIL ','ecobiz').'<img src="'.get_template_directory_uri().'/images/arrow_grey.png" alt="" class="readmore"/></span></a>';
      $out .= '</div>';         
      if ($counter %2 ==0) {
        $out .= '<div class="spacer"></div>'; 
      }      
    } else if ($style == "3col"){
     if ($counter %3 ==0) {
        $out .= '<div class="mainbox2 box-last">'; 
      } else {
        $out .= '<div class="mainbox2">';
      }
      $out .= '<h4><a href="'.get_permalink().'">'.get_the_title().'</a></h4>';
      $out .= '<div class="boximg2">';
      if (function_exists('has_post_thumbnail') && has_post_thumbnail()) {
        $out .= '<img src="'.get_template_directory_uri().'/timthumb.php?src='.thumb_url().'&amp;h=78&amp;w=182&amp;zc=1" alt="" class="boximg-pad" />'."\n";
      }
      $out .= '</div>';
      $out .= '<p>'.excerpt(8).'</p>';
      $out .= '<a href="'.get_permalink().'" class="button"><span>'.__('VIEW MORE DETAIL ','ecobiz').'<img src="'.get_template_directory_uri().'/images/arrow_grey.png" alt="" class="readmore"/></span></a>';
      $out .= '</div>';         
      if ($counter %3 ==0) {
        $out .= '<div class="spacer"></div>'; 
      } 
    } else if ($style == "4col"){
      $out .= '<li'; 
      if ($counter %4 == 0) $out .= ' class="last"';
      $out .= '>';
      $out .= '<div class="portfolio-blockimg3">';
        $out .= '<div class="portfolio-imgbox3">';
        if (function_exists('has_post_thumbnail') && has_post_thumbnail()) {
          $out .= '<img src="'.get_template_directory_uri().'/timthumb.php?src='.thumb_url().'&amp;h=86&amp;w=196&amp;zc=1" alt="" class="boximg-pad" />'."\n";
        }
        $out .= '</div>';
        $out .= '<h4><a href="'.get_permalink().'">'.get_the_title().'</a></h4>';
        $out .= '<p>'.excerpt(15).'</p>';
        $out .= '<a href="'.get_permalink().'" class="button"><span>'.__('VIEW DETAIL ','ecobiz').'<img src="'.get_template_directory_uri().'/images/arrow_grey.png" alt="" class="readmore"/></span></a>';     
        $out .= '</div>';
        $out .= '</li>';      
    }    
    endwhile;
    if ($style == "4col") $out .= '</ul>';
  wp_reset_query();
  return $out;
}


/* ======================================
   Child pages list base on parent page
   [pagelist parent_page="about" style="2col" num="5" ]
   ======================================*/
function imediapixel_pagelist_shortcode($atts,$content=null) {
  global $post;
  
  extract(shortcode_atts(array(
    "parent_page" => '',
    "num" => '',
    "orderby" => '',
    "style" => ''
  ),$atts));
  
  if ($style == "") $style = "3col";
  if ($orderby == "") $orderby = "date";
   
  return imediapixel_pagelist($parent_page,$num,$orderby,$style);
}

add_shortcode('pagelist','imediapixel_pagelist_shortcode');