Calling JavaScript Function using href inside a <td ...>

Currently, on one screen , the following code to display the clicked invoice works.


           <td class="data"><a href="fin_InvoicePartList.htm?Invnum=<HSM name=Invnbr>&xxDealerCd=<HSM name=xxDealerCd>"><HSM name="Invnbr"></a></td>
 <td class="data"><HSM name=DlrOrd></td>
  <td class="data"><hsm name=SysOrd></td>
   <td class="data"><hsm name=OrdDate></td>

Now, I am working on a different screen which is a window. On that screen, when an invoice is clicked, I want to close the window and go back to the parent fields

To do this, I wrote a javascript function goback as below.
  function goback(in1) {
      var parent1 = opener.document;
    var parentField = parent1.getElementById("Invnum");
         parentField.value = in1;
       parentField.focus();
       window.close();
       }
 
Can I invoke this javascript function inside the href inside a <td>   ?

I tried the following two ways but without much success.  The code is not even going to the javascript function.

  <td class="data" <a href="javascript:goback(<HSM name=Invnbr>)"> <HSM name="Invnbr"></a> </td>

  <!--    <td class="data" onclick="goback(<HSM name=Invnbr>)"> <HSM name="Invnbr">  </td> -- > 

Please ignore the HSM tag. It is a local middleware thing and I can assure you that it does not interfere wih standard HTML/JavaScript.

Thanks a Lot.