if (document.images) {
    homeup       = new Image();
    homeup.src   = "../images/nav/RS-nav-home-idle.jpg" ;
    homedown     = new Image() ;
    homedown.src = "../images/nav/RS-nav-home-rollover.jpg" ;
    infoup       = new Image();
    infoup.src   = "../images/nav/RS-nav-info-idle.jpg" ;
    infodown     = new Image() ;
    infodown.src = "../images/nav/RS-nav-info-rollover.jpg" ;
    eduup       = new Image();
    eduup.src   = "../images/nav/RS-nav-edu-idle.jpg" ;
    edudown     = new Image() ;
    edudown.src = "../images/nav/RS-nav-edu-rollover.jpg" ;
    aiup       = new Image();
    aiup.src   = "../images/nav/RS-nav-ai-idle.jpg" ;
    aidown     = new Image() ;
    aidown.src = "../images/nav/RS-nav-ai-rollover.jpg" ;
    innovup       = new Image();
    innovup.src   = "../images/nav/RS-nav-innov-idle.jpg" ;
    innovdown     = new Image() ;
    innovdown.src = "../images/nav/RS-nav-innov-rollover.jpg" ;
	
	bioup			= new Image();
	bioup.src		= "../images/subnav/RS-subnav-bio-idle.jpg" ;
	biodown			= new Image();
	biodown.src 	= "../images/subnav/RS-subnav-bio-rollover.jpg" ;
	blogup			= new Image();
	blogup.src		= "../images/subnav/RS-subnav-blog-idle.jpg" ;
	blogdown		= new Image();
	blogdown.src 	= "../images/subnav/RS-subnav-blog-rollover.jpg" ;
	newsup			= new Image();
	newsup.src		= "../images/subnav/RS-subnav-news-idle.jpg" ;
	newsdown		= new Image();
	newsdown.src 	= "../images/subnav/RS-subnav-news-rollover.jpg" ;
	adviceup		= new Image();
	adviceup.src	= "../images/subnav/RS-subnav-advice-idle.jpg" ;
	advicedown		= new Image();
	advicedown.src 	= "../images/subnav/RS-subnav-advice-rollover.jpg" ;
	mediaup			= new Image();
	mediaup.src		= "../images/subnav/RS-subnav-medpub-idle.jpg" ;
	mediadown		= new Image();
	mediadown.src 	= "../images/subnav/RS-subnav-medpub-rollover.jpg" ;
	contactup		= new Image();
	contactup.src	= "../images/subnav/RS-subnav-contact-idle.jpg" ;
	contactdown		= new Image();
	contactdown.src = "../images/subnav/RS-subnav-contact-rollover.jpg" ;
	trainup			= new Image();
	trainup.src		= "../images/subnav/RS-subnav-training-idle.jpg" ;
	traindown		= new Image();
	traindown.src	= "../images/subnav/RS-subnav-training-rollover.jpg" ;
	learnup			= new Image();
	learnup.src		= "../images/subnav/RS-subnav-learngame-idle.jpg" ;
	learndown		= new Image();
	learndown.src	= "../images/subnav/RS-subnav-learngame-rollover.jpg" ;
	speakup			= new Image();
	speakup.src		= "../images/subnav/RS-subnav-speaking-idle.jpg" ;
	speakdown		= new Image();
	speakdown.src	= "../images/subnav/RS-subnav-speaking-rollover.jpg" ;
	corpmemup		= new Image();
	corpmemup.src		= "../images/subnav/RS-subnav-corpmem-idle.jpg" ;
	corpmemdown		= new Image();
	corpmemdown.src 	= "../images/subnav/RS-subnav-corpmem-rollover.jpg" ;
	entsoftup		= new Image();
	entsoftup.src		= "../images/subnav/RS-subnav-entsoft-idle.jpg" ;
	entsoftdown		= new Image();
	entsoftdown.src 	= "../images/subnav/RS-subnav-entsoft-rollover.jpg" ;
}
function buttondown( buttonname )
{
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "down.src" );
    }
}
function buttonup ( buttonname )
{
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "up.src" );
    }
}