var iRoot = "images/header_nav/np-nav-";

if (document.images) {
    splashup       = new Image();
    splashup.src   = iRoot + "splash-idle.gif" ;
    splashdown     = new Image() ;
    splashdown.src = iRoot + "splash-rollover.gif" ;
    webup       = new Image();
    webup.src   = iRoot + "web-idle.gif" ;
    webdown     = new Image() ;
    webdown.src = iRoot + "web-rollover.gif" ;
    printup       = new Image();
    printup.src   = iRoot + "print-idle.gif" ;
    printdown     = new Image() ;
    printdown.src = iRoot + "print-rollover.gif" ;
    flashup       = new Image();
    flashup.src   = iRoot + "flash-idle.gif" ;
    flashdown     = new Image() ;
    flashdown.src = iRoot + "flash-rollover.gif" ;
    contactup       = new Image();
    contactup.src   = iRoot + "cv-idle.gif" ;
    contactdown     = new Image() ;
    contactdown.src = iRoot + "cv-rollover.gif" ;
	
	splash2up       = new Image();
    splash2up.src   = iRoot + "splash-idle.gif" ;
    splash2down     = new Image() ;
    splash2down.src = iRoot + "splash-rollover.gif" ;
    web2up       = new Image();
    web2up.src   = iRoot + "web-idle.gif" ;
    web2down     = new Image() ;
    web2down.src = iRoot + "web-rollover.gif" ;
    print2up       = new Image();
    print2up.src   = iRoot + "print-idle.gif" ;
    print2down     = new Image() ;
    print2down.src = iRoot + "print-rollover.gif" ;
    flash2up       = new Image();
    flash2up.src   = iRoot + "flash-idle.gif" ;
    flash2down     = new Image() ;
    flash2down.src = iRoot + "flash-rollover.gif" ;
    contact2up       = new Image();
    contact2up.src   = iRoot + "cv-idle.gif" ;
    contact2down     = new Image() ;
    contact2down.src = iRoot + "cv-rollover.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" );
    }
}