>Tried that, but the application still refuses to cooperate :(
>
>

>if (lnKey==13)
>   {
>      alert('Testing...');
>	  var form = document.getElementById('frmAddItem');
>	  
>	  form.action = 'btnRemoveOverdue=Remove+Overdue&' + form.action;
>	  alert(form.action);		
>	  
>	  var btn = document.getElementById('btnRemoveOverdue')
>	  if (btn)
>			btn.click();
>			

>
>I also do not see any of the alert messages. May be there is another way to see that my code is being executed? The problem is that it's C++ application using some browser control to display the page that is being send by VFP application.

You need to add the query string after the actual value of the action.

Also, if you are not seeing a Javascript error, your browser needs to be set to show those errors.