post_thumbnail elseif

if ( has_post_thumbnail())
					{
					$img_src = wp_get_attachment_image_src( get_post_thumbnail_id($GLOBALS['post']->ID), '');
					$thumbnail = $img_src[0];
					}
						elseif ( in_category('145') ) // In Newsletter category?
						{
						$thumbnail = '';
						$category_thumb = $bloginfo.'/images/newsletter.jpg';
						$thumbnail = ( $thumbnail == '' ) ? $category_thumb : $thumbnail;
						}
						elseif ( in_category('141') ) // In News category?
						{
						$thumbnail = '';
						$category_thumb = $bloginfo.'/images/news.jpg';
						$thumbnail = ( $thumbnail == '' ) ? $category_thumb : $thumbnail;
						}
						elseif ( in_category('150') ) // In Fun Stuff category?
						{
						$thumbnail = '';
						$category_thumb = $bloginfo.'/images/funstuff.jpg';
						$thumbnail = ( $thumbnail == '' ) ? $category_thumb : $thumbnail;
						}
						elseif ( in_category('143') ) // In Podcast category?
						{
						$thumbnail = '';
						$category_thumb = $bloginfo.'/images/podcast.jpg';
						$thumbnail = ( $thumbnail == '' ) ? $category_thumb : $thumbnail;
						}
						elseif ( in_category('144') ) // In Video category?
						{
						$thumbnail = '';
						$category_thumb = $bloginfo.'/images/videos.jpg';
						$thumbnail = ( $thumbnail == '' ) ? $category_thumb : $thumbnail;
						}
					else
					{
					$thumbnail = '';
					$default_thumb = $bloginfo.'/images/post_thumb.jpg';
					$thumbnail = ( $thumbnail == '' ) ? $default_thumb : $thumbnail;
					}