function coupg_shortcode_handler($atts, $content=null)
{
                   $form="
            <div class=\"coupg_link_container\"><a href=\"#\">".$content."</a></div>
            <div class=\"coupg_upgrade_box\">
                <div class=\"coupg_box_content\">
                    <div class=\"coupg_subscribe_form\">
                        <div class=\"coupg_header\" id=\"coupg_header\">".nl2br($header, false)."</div>
                        <div class=\"coupg_description\" id=\"coupg_description\">".nl2br($description, false)."</div>
                        <div class=\"coupg_subscribe_form_body\">
                        <span class=\"coupg_hidden\">".$default."</span>
                        <input class=\"coupg_email\" type=\"email\" value=\"".get_post_meta($default, 'coupg_default_email_text', true)."\" name=\"EMAIL\" id=\"coupg_email\" onfocus=\"if(this.value=='".get_post_meta($default, 'coupg_default_email_text', true)."') this.value='';\" onblur=\"if(!this.value) this.value='".get_post_meta($default, 'coupg_default_email_text', true)."';\">
                        <button class=\"coupg_submit_button\" type=\"button\" name=\"coupg_subscribe_button_preview\">".get_post_meta($default, 'coupg_button_text', true)."</button>
                        </div>
                        <div class=\"coupg_subscribe_form_notice\">".get_post_meta($default, 'coupg_privacy_statement', true)."</div>
                    </div>
                    <span class=\"coupg_close_popup_button\"></span>
                </div>
            </div>";
                    return $form;

}