Widget with Conditional Advertisements

//Just use "image widget" Plugin************************************************************************************

<!-- Insert into sidebar.php -->
//It's conditional widget---------------------------------------------------------------------------
    <?php $options=get_option('plugin_options'); ?>
    <?php
        if($options['home_page_ads']>=1) {
    ?>
    <div id="home_ad_1" class="advert" style="background: transparent url(<?php bloginfo('stylesheet_directory'); ?>/_images/ad_box.gif) no-repeat;">
        <?php if (function_exists('dynamic_sidebar') && dynamic_sidebar('home_ad_1')) : else : ?>
        <div class="pre-widget">
            <p>&nbsp;</p>
            <p>&nbsp;</p>
        </div>
        <?php endif; ?>
    </div>
<?php } ?>

<!-- Insert into style.css -->
.widget-area .advert {
    margin: 0 auto 20px auto;
    width:  284px;
    height: 166px;
    padding: 7px 0 0 5px;
}


<?php
//Only for dashboard setting panel-----------------------------------------------------------------------------------------
// Insert a menu item in the admin menu called "Advertisements"
add_action('admin_menu', 'create_theme_options_page');
function create_theme_options_page() {
  add_options_page('Advertisements', 'Advertisements', 'administrator', __FILE__, 'build_options_page');
}

// Builds the Advertisements page
function build_options_page() {
    ?>
  <div id="theme-options-wrap">
    <div class="icon32" id="icon-tools"> <br /> </div>
    <h2>Advertisements</h2>
    <p>Set the number of ads in the sidebar.</p>
    <form method="post" action="options.php">
      <?php settings_fields('plugin_options'); ?>
      <?php do_settings_sections(__FILE__); ?>
      <p class="submit">
        <input name="Submit" type="submit" class="button-primary" value="<?php esc_attr_e('Save Changes'); ?>" />
      </p>
    </form>
  </div>
<?php
}

// Initializes the sections of the page when the Dashboard boots up
add_action('admin_init', 'register_and_build_fields');
function register_and_build_fields() {
  register_setting('plugin_options', 'plugin_options', 'validate_setting');
  add_settings_section('main_section', '', 'section_cb', __FILE__);
  add_settings_field('home_page_ads', 'Page Ads:', 'home_page_ads_setting', __FILE__, 'main_section');
}

// Ensures that the correct options are chosen
function validate_setting($plugin_options) {
  return $plugin_options;
}
function section_cb() {}

// Sets up the select menus
function home_page_ads_setting() {
  $options = get_option('plugin_options');
  $items = array('0','1','2','3');
  echo "<select name='plugin_options[home_page_ads]' style='width:50px;' />";
    foreach($items as $item) {
        $selected = ( $options['home_page_ads'] === $item ) ? 'selected="selected"' : ''    ;
        echo "<option value='$item' $selected > $item </option>";
    };
  echo '</select>';
}
?>