if (document.images) {
    whobarup       = new Image();
    whobarup.src   = "images/who_footer.gif" ;
    whobardown     = new Image() ;
    whobardown.src = "images/who_footer_on.gif" ;
	
	whatbarup       = new Image();
    whatbarup.src   = "images/what_footer.gif" ;
    whatbardown     = new Image() ;
    whatbardown.src = "images/what_footer_on.gif" ;
	
	contactbarup       = new Image();
    contactbarup.src   = "images/contact_footer.gif" ;
    contactbardown     = new Image() ;
    contactbardown.src = "images/contact_footer_on.gif" ;
	
	whomainbarup       = new Image();
    whomainbarup.src   = "images/who_off.gif" ;
    whomainbardown     = new Image() ;
    whomainbardown.src = "images/who_on.gif" ;
	
	whatmainbarup       = new Image();
    whatmainbarup.src   = "images/what_off.gif" ;
    whatmainbardown     = new Image() ;
    whatmainbardown.src = "images/what_on.gif" ;
	
	contactmainbarup       = new Image();
    contactmainbarup.src   = "images/contact_off.gif" ;
    contactmainbardown     = new Image() ;
    contactmainbardown.src = "images/contact_on.gif" ;


}
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" );
    }
}