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    <title>reCAPTCHA demo: Explicit render for multiple widgets</title>
    <script type="text/javascript">
      var verifyCallback = function(response) {
      var widgetId1;
      var widgetId2;
      var onloadCallback = function() {
        // Renders the HTML element with id 'example1' as a reCAPTCHA widget.
        // The id of the reCAPTCHA widget is assigned to 'widgetId1'.
        widgetId1 = grecaptcha.render('example1', {
          'sitekey' : 'your_site_key',
          'theme' : 'light'
        widgetId2 = grecaptcha.render(document.getElementById('example2'), {
          'sitekey' : 'your_site_key'
        grecaptcha.render('example3', {
          'sitekey' : 'your_site_key',
          'callback' : verifyCallback,
          'theme' : 'dark'
    <!-- The g-recaptcha-response string displays in an alert message upon submit. -->
    <form action="javascript:alert(grecaptcha.getResponse(widgetId1));">
      <div id="example1"></div>
      <input type="submit" value="getResponse">
    <!-- Resets reCAPTCHA widgetId2 upon submit. -->
    <form action="javascript:grecaptcha.reset(widgetId2);">
      <div id="example2"></div>
      <input type="submit" value="reset">
    <!-- POSTs back to the page's URL upon submit with a g-recaptcha-response POST parameter. -->
    <form action="?" method="POST">
      <div id="example3"></div>
      <input type="submit" value="Submit">
    <script src=""
        async defer>