>Hi everybody,
>
>I have a JavaScript function I'd like to call either with one or two parameters. The second parameter is a character string.
>
>I'm wondering how can I check for the parameter being passed?
>
>For some reason, check if (MyParameter) produces an error "Object required". I got the same error trying
>typeof MyParameter !="undefined".
>
>How can I test for the second parameter?
>
>Thanks a lot in advance.

I think this should work:

function Sample(param)
{
   if (param == undefined)
      alert('No parameter.');
   else
      alert('Parameter passed: ' + param);
}