changing style in the archive page

Hi Elliott,

I added a class, line 87, but nothing happens

Carosch

Hello,

in private, the access code

the url to an archive page, to see my problem.

My goal:
add a different class if the archive content belong to a category or another.

I made that to replace the first echo

<?php
// case #1 : the archive belongs to the parent category 'museecollections' and childs
if ( in_category( 'museecollections' ) ||  in_category( 'le-musee' ) ||  in_category( 'la-visite' ) ||  in_category( 'les-objets-emblematiques' ) ||  in_category( 'equipe' )) {
	echo "<article class='".implode(" ", get_post_class('blocs-archive-musee post-entry post-entry-type-'.$post_format . " " . $post_class . " ".$with_slider))."' ".avia_markup_helper(array('context' => 'entry','echo'=>false)). ">";
} 

// case #2 : the archive belongs to the parent category 'espace-pedagogique' and childs
elseif ( in_category( 'espace-pedagogique' )) {
	echo "<article class='".implode(" ", get_post_class('blocs-archive-pedago post-entry post-entry-type-'.$post_format . " " . $post_class . " ".$with_slider))."' ".avia_markup_helper(array('context' => 'entry','echo'=>false)). ">";
} 

// case #2 : the archive belongs to the parent category 'preparer-sa-visite' and childs
elseif ( in_category( 'preparer-sa-visite' )) {
	echo "<article class='".implode(" ", get_post_class('blocs-archive-visite post-entry post-entry-type-'.$post_format . " " . $post_class . " ".$with_slider))."' ".avia_markup_helper(array('context' => 'entry','echo'=>false)). ">";
} 

// dans le cas où le post appartient à aucune categories et est donc dans l'agenda
else {
	echo "<article class='".implode(" ", get_post_class('blocs-archive-agenda post-entry post-entry-type-'.$post_format . " " . $post_class . " ".$with_slider))."' ".avia_markup_helper(array('context' => 'entry','echo'=>false)). ">";
}
?>

but nothing I write in loop-index.php make any visual difference.
like if this is not the page witch is use for the archive

Carosch