function hide(what)
  {
    if (!document.getElementById) {
      return null;
    }
    showWhat = document.getElementById(what);
    showWhat.style.display = "none";
  } 
  
    function show(what)
  {
    if (!document.getElementById) {
      return null;
    }
    showWhat = document.getElementById(what);
    showWhat.style.display = "block";
  } 
  
  function hideall(val)
  {
    hide('Intro');
	hide('First');
	hide('Second');
	hide('Third');
	hide('Fourth');
	hide('Fifth');
	hide('Sixth');
	hide('Seventh');
	hide('Eighth');
	
	hide('IntroFlash');
	hide('FirstFlash');
	hide('SecondFlash');
	hide('ThirdFlash');
	hide('FourthFlash');
	hide('FifthFlash');
	hide('SixthFlash');
	hide('SeventhFlash');
	hide('EighthFlash');
	
	flashwindow = val + 'Flash';
	show(val);
	show(flashwindow);
	show('NavPanel');
  }