index.html

<!-- Global site tag (gtag.js) - Google Ads: 10861189963 -->
<script async src="https://www.googletagmanager.com/gtag/js?id=AW-10861189963"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'AW-10861189963');
</script>


<!-- Event snippet for Test Purchase conversion page
In your html page, add the snippet and call gtag_report_conversion when someone clicks on the chosen link or button. -->
<script>
function gtag_report_conversion(url) {
  var callback = function () {
    if (typeof(url) != 'undefined') {
      window.location = url;
    }
  };
  gtag('event', 'conversion', {
      'send_to': 'AW-10861189963/F7w6CIm226kDEMu2grso',
      'transaction_id': '',
      'event_callback': callback
  });
  return false;
}
</script>


<form action="" name="myForm">
         Name: <input type="text" name="name">
         <input type="hidden" id="gclid_field" name="gclid_field" value="">
         <input type="submit" value="Submit Form" name="btnSubmit">
   </form>

<script>


function getParam(p) {
var match = RegExp('[?&]' + p + '=([^&]*)').exec(window.location.search);
return match && decodeURIComponent(match[1].replace(/\+/g, ' '));
}

function getExpiryRecord(value) {
var expiryPeriod = 90 * 24 * 60 * 60 * 1000; // 90 day expiry in milliseconds

var expiryDate = new Date().getTime() + expiryPeriod;
return {
value: value,
expiryDate: expiryDate
};
}

function addGclid() {
var gclidParam = getParam('gclid');
var gclidFormFields = ['gclid_field', 'foobar']; // all possible gclid form field ids here
var gclidRecord = null;
var currGclidFormField;

var gclsrcParam = getParam('gclsrc');
var isGclsrcValid = !gclsrcParam || gclsrcParam.indexOf('aw') !== -1;

gclidFormFields.forEach(function (field) {
if (document.getElementById(field)) {
currGclidFormField = document.getElementById(field);
}
});

if (gclidParam && isGclsrcValid) {
gclidRecord = getExpiryRecord(gclidParam);
localStorage.setItem('gclid', JSON.stringify(gclidRecord));
}

var gclid = gclidRecord || JSON.parse(localStorage.getItem('gclid'));
var isGclidValid = gclid && new Date().getTime() < gclid.expiryDate;

if (currGclidFormField && isGclidValid) {
currGclidFormField.value = gclid.value;
}
}

window.addEventListener('load', addGclid);

</script>