How to save click in HTML banners?

[savina]

Please could someone help with the problem. I can not save clicks in HTML banners.

The click tag which we use is working on some and on some doesn't. 

Now we use this one: <a href="https://www.link" style="position:absolute;top:0;left:0: display:inline-block; width:728px; height:90px; z-index:-5;">
</a>

Please exuse me if the question is very simple but I'm not a developer.

 

[Maro]

I am using this in Google WebDesigner

 <script type="text/javascript" gwd-events="handlers">
    window.gwd = window.gwd || {};
    gwd.exit = function(event) {
      clickTag = window.location.search.substring(1).split("clickTag=")[1];
      window.open(clickTag);
    };
  </script>