entire teaser as link to node
Something like this should work. Add it to your template.php file. Using preprocess_node gives you a little more control so you aren't just arbitrarily loading the script on every page.

function THEMENAME_preprocess_node(&amp;$variables) {
  if ($variables['type'] == 'blog' &amp;&amp; $variables['view_mode'] == 'teaser') {
    drupal_add_js($theme_path.'/js/new_teaser.js');
  }
}