<div id="nc_captcha_container0" style="display:inline-block">
  <input name="nc_captcha_hash" value="2e985d509b164fce8f7981b604f36c57" type="hidden">
  <img name="nc_captcha_img" src="/netcat/modules/captcha/img.php?code=2e985d509b164fce8f7981b604f36c57">
</div>
<script>
  window.onload = function () {
    alert(document.querySelector('#nc_captcha_container0 input').value);
  };
</script>
