function renderLogin()
 {
     global $oscTemplate;
     $lwa_config = LoginWithAmazon_Tools::get_config();
     $csrf_token = LoginWithAmazon_Tools::get_csrf_token();
     if ($lwa_config['client_id'] && $csrf_token) {
         $lwa_client_id = $lwa_config['client_id'];
         $popup = 'true';
         if (empty($_SERVER['HTTPS'])) {
             $popup = 'false';
         }
         $output = '<script type="text/javascript">' . "\n";
         $output .= 'var client_id = \'' . $lwa_client_id . '\';' . "\n";
         $output .= 'var popup = ' . $popup . ';' . "\n";
         $output .= 'var login_success_url = \'' . tep_href_link('loginwithamazon.php', '', 'SSL') . '\';' . "\n";
         $output .= 'function r(f){/in/.test(document.readyState)?setTimeout(\'r(\'+f+\')\',9):f()}' . "\n";
         $output .= "\n                r(function(){\n                    var amazon_root = document.createElement('div');\n                    amazon_root.setAttribute('id', 'amazon-root');\n                    document.body.appendChild(amazon_root);\n                    window.onAmazonLoginReady = function() {\n                        amazon.Login.setClientId(client_id);\n                        amazon.Login.setUseCookie(true);\n                        elements = document.getElementsByTagName('a');\n                        for(var i=0; i<elements.length; i++){\n                            if (elements[i] && elements[i].getAttribute('href') && elements[i].getAttribute('href').indexOf('logoff.php', elements[i].getAttribute('href').length - 10) !== -1) { \n                                elements[i].onclick = function() { \n                                    amazon.Login.logout();\n                                }\n                            }\n                        }\n                    };\n                    (function(d) {\n                        var a = d.createElement('script'); a.type = 'text/javascript';\n                        a.async = true; a.id = 'amazon-login-sdk';\n                        a.src = 'https://api-cdn.amazon.com/sdk/login1.js';\n                        d.getElementById('amazon-root').appendChild(a);\n                    })(document);\n\n                    var loginWithAmazonButton = document.createElement('div');\n                    loginWithAmazonButton.setAttribute('id', 'LoginWithAmazon');\n                    loginWithAmazonButton.setAttribute('style', 'clear:both;float:right;cursor:pointer;');\n                    loginWithAmazonButton.innerHTML = '<img border=\"0\" alt=\"Login with Amazon\" src=\"https://images-na.ssl-images-amazon.com/images/G/01/lwa/btnLWA_gold_156x32.png\" width=\"156\" height=\"32\" />';\n\n                    var loginForm = \$('form[name=login]');\n                    if(loginForm.length > 0) {\n                        loginForm = loginForm[0];\n                        loginForm.parentNode.insertBefore(loginWithAmazonButton, loginForm.nextSibling);\n                        document.getElementById('LoginWithAmazon').onclick = function() {\n                            var loginOptions = {\n                                scope : 'profile',\n                                state: '" . $csrf_token . "',\n                                popup: popup,\n                            };\n                            amazon.Login.authorize(loginOptions, login_success_url);\n                            return false;\n                        }\n                    }\n                    var registerForm = \$('form[name=create_account]');\n                    if(registerForm.length > 0) {\n                        registerForm = registerForm[0];\n                        loginWithAmazonButton.setAttribute('style', 'clear:both;float:right;cursor:pointer;margin-top:10px;');\n                        \$(registerForm).append(loginWithAmazonButton);\n                        document.getElementById('LoginWithAmazon').onclick = function() {\n                            var loginOptions = {\n                                scope : 'profile',\n                                state: '" . $csrf_token . "',\n                                popup: popup,\n                            };\n                            amazon.Login.authorize(loginOptions, login_success_url);\n                            return false;\n                        }\n                    }\n                });\n            " . "\n";
         $output .= '</script>' . "\n";
         $oscTemplate->addBlock($output . "\n", $this->group);
     }
 }