Small program :<BR>
<TEXTAREA   Name=TextArea1   Rows=18   Cols=79   Wrap=Off   >
//----- Variables ( unused by the  factorial  function )
var  x = 3 ;
var  y = 4 ;

//----- My function
function   Factorial  ( I_n )
{
   if (I_n == 0)
      return  1
   else
      return  I_n * Factorial(I_n-1);
}
   Factorial(5);
</TEXTAREA>


<BLOCKQUOTE>
   <INPUT   Type=BUTTON   Value="Evaluate"
      OnClick="EditResult.value=eval(TextArea1.value);"   > &nbsp; &nbsp;

   Result : 
   <INPUT   Type=TEXT   Name=EditResult   Size=25   Value=""   >
</BLOCKQUOTE>