gistfile1.php

<?php
/**
 * This function includes a css file based on the selected taxonomy terms.
 * With this, the submitter can assign extra css for the site.
 * @param $vid the vid of the taxonomy
 */
function _taxonomy_based_css_loader($vid){
  $nid = null;
  if (arg(0) == 'node' && is_numeric(arg(1))) {
    $nid =  arg(1);
  }
  else {
    return;
  }
  $node = node_load($nid);
  if (isset($node->taxonomy)) {
    foreach ($node->taxonomy as $t) {
      if ($t->vid == $vid) {
        drupal_add_css(path_to_theme() . '/' . $t->name . '.css');
      }
    }
  }
}