finally null variables

[Stan James]

I've recently seen some JSP pages and JS files that always have try-finally and always set any variables allocated to null. Sometimes the arguments, too.

function blivet( thing )
{
   try
   {
      var other = 1;
      etc.
   }
   finally
   {
      other = null;
      thing = null;
   }
}

Is this necessary? A good idea? Totally bonkers? (I'm leaning towards door #3)

[Bear Bibeault]

I'd lean towards "obsessive compulsive".