让IE8在IE7兼容模式下运行，Drupal中通过以下代码可实现:

<?php
    $meta_ie_render_engine = array(
        '#type' => 'html_tag',
        '#tag' => 'meta',
        '#attributes' => array(
            'http-equiv' => 'X-UA-Compatible',
            'content' =>  'IE=7',
        ),
        '#weight' => -9999,
    );
    // Add header meta tag for IE to head

    drupal_add_html_head($meta_ie_render_engine, 'meta_ie_render_engine');
?>