//pre-load button images, if support by browser
if (document.images)
  {

    // ...buttonup - button not selected
    // ...buttondown - button selected

    // Home button
    homebuttonup       = new Image();
    homebuttonup.src   = "buttons/btnHome.png" ;
    homebuttondown     = new Image() ;
    homebuttondown.src = "buttons/btnHomeSelect.png" ;

    // About Us button
    aboutbuttonup       = new Image();
	aboutbuttonup.src   = "buttons/btnAboutUs.png" ;
	aboutbuttondown     = new Image() ;
    aboutbuttondown.src = "buttons/btnAboutUsSelect.png" ;

    // Contact Us button
    contactbuttonup       = new Image();
	contactbuttonup.src   = "buttons/btnContactUs.png" ;
	contactbuttondown     = new Image() ;
    contactbuttondown.src = "buttons/btnContactUsSelect.png" ;

    // Dance button
    dancebuttonup       = new Image();
	dancebuttonup.src   = "buttons/btnDance.png" ;
	dancebuttondown     = new Image() ;
    dancebuttondown.src = "buttons/btnDanceSelect.png" ;
    
    // Dance Wear button
    dancewbuttonup       = new Image();
	dancewbuttonup.src   = "buttons/btnDancewear.png" ;
	dancewbuttondown     = new Image() ;
    dancewbuttondown.src = "buttons/btnDancewearSelect.png" ;
    
     // Compani button
        companibuttonup       = new Image();
    	companibuttonup.src   = "buttons/btnCompani.png" ;
    	companibuttondown     = new Image() ;
    companibuttondown.src = "buttons/btnCompaniSelect.png" ;

    // Fitness button
    fitnessbuttonup       = new Image();
	fitnessbuttonup.src   = "buttons/btnFitness.png" ;
	fitnessbuttondown     = new Image() ;
    fitnessbuttondown.src = "buttons/btnFitnessSelect.png" ;

    // Calendar button
    calendarbuttonup       = new Image();
	calendarbuttonup.src   = "buttons/btnCalendar.png" ;
	calendarbuttondown     = new Image() ;
    calendarbuttondown.src = "buttons/btnCalendarSelect.png" ;

    // News button
    newsbuttonup       = new Image();
	newsbuttonup.src   = "buttons/btnNews.png" ;
	newsbuttondown     = new Image() ;
    newsbuttondown.src = "buttons/btnNewsSelect.png" ;

    // FAQ button
    faqbuttonup       = new Image();
	faqbuttonup.src   = "buttons/btnFaq.png" ;
	faqbuttondown     = new Image() ;
    faqbuttondown.src = "buttons/btnFaqSelect.png" ;

    // Gallery button
    gallerybuttonup       = new Image();
	gallerybuttonup.src   = "buttons/btnGallery.png" ;
	gallerybuttondown     = new Image() ;
    gallerybuttondown.src = "buttons/btnGallerySelect.png" ;

    // Faculty button
    facultybuttonup       = new Image();
	facultybuttonup.src   = "buttons/btnFaculty.png" ;
	facultybuttondown     = new Image() ;
    facultybuttondown.src = "buttons/btnFacultySelect.png" ;

    // Comments button
    commentsbuttonup       = new Image();
	commentsbuttonup.src   = "buttons/btnComments.png" ;
	commentsbuttondown     = new Image() ;
    commentsbuttondown.src = "buttons/btnCommentsSelect.png" ;

    // Links button
    linksbuttonup       = new Image();
	linksbuttonup.src   = "buttons/btnLinks.png" ;
	linksbuttondown     = new Image() ;
    linksbuttondown.src = "buttons/btnLinksSelect.png" ;

    // Jobs button
    jobsbuttonup       = new Image();
	jobsbuttonup.src   = "buttons/btnJobs.png" ;
	jobsbuttondown     = new Image() ;
    jobsbuttondown.src = "buttons/btnJobsSelect.png" ;

    // Subscribe button
    subscribebuttonup       = new Image();
	subscribebuttonup.src   = "buttons/btnSubscribe.png" ;
	subscribebuttondown     = new Image() ;
    subscribebuttondown.src = "buttons/btnSubscribeSelect.png" ;

  }

// buttondown changes button to selected image
function buttondown( buttonname )
  {
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "down.src" );
    }
  }

// buttonup changes button back to non-selected image
function buttonup ( buttonname )
  {
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "up.src" );
    }
  }