how i can knowing if the checkbox is checked or not on the form
function darksite_config_page() { $form['darksite_status'] = array( '#title' => t('Enable pop up screen'), '#description' => t('When enabled, a pop up screen will be displayed on the home page.'), '#type' => 'checkbox', '#default_value' => variable_get('darksite_status', 0) ); return system_settings_form($form); }