title: How can I insert a jQuery plugin into PHP code?
body: <p>I want to insert the jQuery plugin <em><a href="http://thefinishedbox.com/freebies/scripts/jquery-dropdown-login/" rel="nofollow">dropdown login form</a></em> to make my website more pretty, but I am really confused where and how to insert jQuery into my code. For instance the following is my <code>index.php</code>:</p>
  
  <pre><code>&lt;?php
      include ('book_fns.php');
      session_start();
      do_html_header("Welcome to Store");
      echo "&lt;p&gt;Please choose a category:&lt;/p&gt;";
  
      // Get categories out of database
      $cat_array = get_categories();
  
      // Display as links to cat pages
      display_categories($cat_array);
  
      //If logged in as admin, show add, delete, edit cat links.
      if(isset($_SESSION['admin_user'])) {
          display_button("admin.php", "admin-menu", "Admin Menu");
      }
      do_html_footer();
  ?&gt;
  </code></pre>
  
  <p>And I want to add the jQuery plugin to the top of my index page.</p>
  
  <p>How do I insert this jQuery plugin?</p>