prototype function to stimulate an event -javascript

I need to pass an variable from html to a javascript function which POSTs a request to a website:

In template (tag-info.html):

<td>
<a id = "gbrowse" href="#" onclick="gbrowse('onclick','<% gene.feature.uniquename %>')">
<%= gene.feature.uniquename %>
</a>
</td>

In Javascript (TagInfoView.js)

TagInfoView.prototype.gbrowse = function(eventName,tc){
         var method = "POST";
         var path = [website_name];
         var params = {"#search":tc};
         var form = document.createElement("form");
         form.setAttribute("method", method);
         form.setAttribute("action", path);

         for (var key in params) {
            if(params.hasOwnProperty(key)) {
                var hiddenField = document.createElement("input");
                hiddenField.setAttribute("type", "hidden");
                hiddenField.setAttribute("name", key);
                hiddenField.setAttribute("value", params[key]);
                form.appendChild(hiddenField);
            }
         }

      document.body.appendChild(form);
      form.submit();
};

$('#gbrowse').gbrowse('onclick',tc);

With this I get 'tc' not defined error. How do I make a better call to the function gbrowse to execute the POST request to a website?