In addition to being able to style particular pages or groups of pages, Drupal makes it possible to provide specific styling for different page elements.
Drupal provides $is_front as a means of determining whether the page currently displayed is the front page. $is_frontis set to true if Drupal is rendering the front page; otherwise it is set to false.
We can use $is_front in our page.tpl.php file to help toggle the display of items we want to associate with the front page. To display an element on only the front page, make it conditional on the state of $is_front. For example, to display the site slogan on only the front page of the site, wrap $site_slogan (in your page.tpl.php file) as follows:
<?php if ($is_front): ?> <?php print $site_slogan; ?> <?php endif; ?>
To set up an alternative condition, so that one element will appear on the front page but a different element will appear on other pages...