```
<script type="text/javascript">
window.onload = function () {
var s = document.createElement('script');
s.type = 'text/javascript';
s.src = "http://www.example.com/abc/abc.js?timestamp=" + new Date().getTime();
s.id = 'help-wall';
s.data-campaign-id ='6';
document.body.appendChild(s);
}
</script>

```

showing error in **s.data-campaign-id**.Please help