>>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.

I've tried originally form.action = form.action + '&btnRemoveOverdue=Remove+Overdue'; with the same result.

I am not sure about your other suggestion. When I was having an error in the script (unclosed }), I did get the message from the browser about an error. But I am not getting any alerts and I think it may be due to the fact I'm not using browser directly, I'm using C++ application. Although I am also going to try to check generated HTML directly in the browser, thanks.