if (document.images)
{
  arrowdwngrn= new Image(7,4); 
  arrowdwngrn.src="/images/arrow-dwn-green.gif"; 
  
  arrowwht= new Image(19,7); 
  arrowwht.src="/images/arrow.gif"; 
  
  sdbrhd= new Image(200,40); 
  sdbrhd.src="/images/sidebar_head.gif"; 
  
  bknvbr= new Image(1,40);
  bknvbr.src="/images/back_navbar.gif";
  
  headerlogo= new Image(900,50);
  headerlogo.src="/images/header_logo.gif";  
}