if (document.images)
{

  nav01a= new Image(48,37); 
  nav01a.src="/acting/img/0_bio.gif"; 

  nav01b= new Image(48,37); 
  nav01b.src="/acting/img/1_bio.gif"; 

  nav02a= new Image(81,37); 
  nav02a.src="/acting/img/0_shows.gif";  

  nav02b= new Image(81,37); 
  nav02b.src="/acting/img/1_shows.gif";  

}