window.onerror = null;
window.defaultStatus = '';
var initialized = 0;
var menus = new Array();
var menustatus = new Array();
var menuovers = new Array();

function init ()
{
 initialized = 1;
 menustatus[0] = "closed";
 menustatus[1] = "closed";
 menustatus[2] = "closed";
 menustatus[3] = "closed";
 menustatus[4] = "closed";
 menustatus[5] = "closed";
 menustatus[6] = "closed";
 menustatus[7] = "closed";
 menustatus[8] = "closed";

 if(parseInt(navigator.appVersion) > 3){
  if(navigator.appName == "Netscape"){
   menuovers[0] = window.document.menu0overs;
   menuovers[1] = window.document.menu1overs;
   menuovers[2] = window.document.menu2overs;
   menuovers[3] = window.document.menu3overs;
   menuovers[4] = window.document.menu4overs;
   menuovers[5] = window.document.menu5overs;
   menuovers[6] = window.document.menu6overs;
   menuovers[7] = window.document.menu7overs;
   menuovers[8] = window.document.menu8overs;

   menus[0] = window.document.menu0;
   menus[1] = window.document.menu1;
   menus[2] = window.document.menu2;
   menus[3] = window.document.menu3;
   menus[4] = window.document.menu4;
   menus[5] = window.document.menu5;
   menus[6] = window.document.menu6;
   menus[7] = window.document.menu7;
   menus[8] = window.document.menu8;
  }else{
   menuovers[0] = document.all.menu0overs.style;
   menuovers[1] = document.all.menu1overs.style;
   menuovers[2] = document.all.menu2overs.style;
   menuovers[3] = document.all.menu3overs.style;
   menuovers[4] = document.all.menu4overs.style;
   menuovers[5] = document.all.menu5overs.style;
   menuovers[6] = document.all.menu6overs.style;
   menuovers[7] = document.all.menu7overs.style;
   menuovers[8] = document.all.menu8overs.style;

   menus[0] = document.all.menu0.style;
   menus[1] = document.all.menu1.style;
   menus[2] = document.all.menu2.style;
   menus[3] = document.all.menu3.style;
   menus[4] = document.all.menu4.style;
   menus[5] = document.all.menu5.style;
   menus[6] = document.all.menu6.style;
   menus[7] = document.all.menu7.style;
   menus[8] = document.all.menu8.style;
  }
 }
}

function show(menunumber)
{
 if(parseInt(navigator.appVersion) > 3)
 {
  if(menuovers[menunumber])
  {
   menuovers[menunumber].visibility = 'visible';
   menuovers[menunumber].zIndex = '310';
  }
  menus[menunumber].visibility = 'visible';
  menus[menunumber].zIndex = '300';
  menustatus[menunumber] = 'open';
 }
}

function kohrkill()
{
 clearmenus();
 if(parseInt(navigator.appVersion) > 3)
 {
  for(i=0; i<menus.length; i++)
  {
   if(menustatus[i] == 'open')
   {
    if(menuovers[i])
    {
     menuovers[i].visibility = 'hidden';
     menuovers[i].zIndex = '110';
    }
    menus[i].visibility = 'hidden';
    menus[i].zIndex = '100';
    menustatus[i] = 'closed';
   }
  }
 }
}

function imagerep(imgname, divname)
{
 if (parseInt(navigator.appVersion) > 3)
 {
  if (document.layers)
   eval("window.document." + divname + ".document['" + imgname + "'].src = " + imgname + "over.src");
  else
   eval("document['" + imgname + "'].src = " + imgname + "over.src");
 }else{
  if(navigator.appName == "Netscape")
  {
   eval("document['imgmenu" + imgname + "'].src = menu" + imgname + "over.src");
   menustatus[imgname] = "open";
  }
 }
}

function eraseimage(imgname, divname)
{
 if(parseInt(navigator.appVersion) > 3){
		if(document.layers) eval("window.document." + divname + ".document['" + imgname + "'].src = blank.src");
		else eval("document['" + imgname + "'].src = blank.src");
	}
	else{
		if(navigator.appName == "Netscape"){
		eval("document['imgmenu" + imgname + "'].src = menu" + imgname + "off.src");
		}
	}
}

function nshider()
{
	if(initialized) kohrkill();
}

function iehider()
{
	if(window.event.toElement && window.event.toElement.className != "menu") kohrkill();
}

function change(Name,Image,No,Msg) {

	if (document.images) {
		document [Name].src = eval(Image + No + ".src");
	}
	if (Msg) self.status = eval(Image + "2");

	return true
}

if (!document.images) {}

else {
 nav_hom0=new Image();
 nav_hom0.src="media/menu/nav_hom0.gif";
 nav_hom1=new Image();
 nav_hom1.src="media/menu/nav_hom1.gif";

 nav_for0=new Image();
 nav_for0.src="media/menu/nav_for0.gif";
 nav_for1=new Image();
 nav_for1.src="media/menu/nav_for1.gif";

 nav_con0=new Image();
 nav_con0.src="media/menu/nav_con0.gif";
 nav_con1=new Image();
 nav_con1.src="media/menu/nav_con1.gif";

 nav_des0=new Image();
 nav_des0.src="media/menu/nav_des0.gif";
 nav_des1=new Image();
 nav_des1.src="media/menu/nav_des1.gif";

 nav_pro0=new Image();
 nav_pro0.src="media/menu/nav_pro0.gif";
 nav_pro1=new Image();
 nav_pro1.src="media/menu/nav_pro1.gif";

 nav_sup0=new Image();
 nav_sup0.src="media/menu/nav_sup0.gif";
 nav_sup1=new Image();
 nav_sup1.src="media/menu/nav_sup1.gif";

 nav_flu0=new Image();
 nav_flu0.src="media/menu/nav_flu0.gif";
 nav_flu1=new Image();
 nav_flu1.src="media/menu/nav_flu1.gif";

 nav_pio0=new Image();
 nav_pio0.src="media/menu/nav_pio0.gif";
 nav_pio1=new Image();
 nav_pio1.src="media/menu/nav_pio1.gif";

 nav_res0=new Image();
 nav_res0.src="media/menu/nav_res0.gif";
 nav_res1=new Image();
 nav_res1.src="media/menu/nav_res1.gif";

 nav_sea0=new Image();
 nav_sea0.src="media/menu/nav_sea0.gif";
 nav_sea1=new Image();
 nav_sea1.src="media/menu/nav_sea1.gif";

 contact0=new Image();
 contact0.src="media/menu/side_contact0.gif";
 contact1=new Image();
 contact1.src="media/menu/side_contact1.gif";

 links0=new Image();
 links0.src="media/menu/side_links0.gif";
 links1=new Image();
 links1.src="media/menu/side_links1.gif";

 sitemap0=new Image();
 sitemap0.src="media/menu/side_sitemap0.gif";
 sitemap1=new Image();
 sitemap1.src="media/menu/side_sitemap1.gif";

 references0=new Image();
 references0.src="media/menu/side_references0.gif"
 references1=new Image();
 references1.src="media/menu/side_references1.gif"

 tq0=new Image();
 tq0.src="media/menu/side_tq0.gif";
 tq1=new Image();
 tq1.src="media/menu/side_tq1.gif";

 var introductionover=new Image();
 introductionover.src="media/menu/drop_home_introduction.gif";

 var liftover=new Image();
 liftover.src="media/menu/drop_forces_lift.gif";

 var dragover=new Image();
 dragover.src="media/menu/drop_forces_drag.gif";

 var weightover=new Image();
 weightover.src="media/menu/drop_forces_weight.gif";

 var thrustover=new Image();
 thrustover.src="media/menu/drop_forces_thrust.gif";

 var airfoilsover=new Image();
 airfoilsover.src="media/menu/drop_control_airfoils.gif";

 var elevatorsover=new Image();
 elevatorsover.src="media/menu/drop_control_elevators.gif";

 var ruddersover=new Image();
 ruddersover.src="media/menu/drop_control_rudders.gif";

 var aileronsover=new Image();
 aileronsover.src="media/menu/drop_control_ailerons.gif";

 var wingsover=new Image();
 wingsover.src="media/menu/drop_design_wings.gif";

 var fuselageover=new Image();
 fuselageover.src="media/menu/drop_design_fuselage.gif";

 var tailover=new Image();
 tailover.src="media/menu/drop_design_tail.gif";

 var boundaryover=new Image();
 boundaryover.src="media/menu/drop_fluid_boundary.gif";

 var flowsover=new Image();
 flowsover.src="media/menu/drop_fluid_flows.gif";

 var wakesover=new Image();
 wakesover.src="media/menu/drop_fluid_wakes.gif";

 var turbulenceover=new Image();
 turbulenceover.src="media/menu/drop_fluid_turbulence.gif";

 var propellersover=new Image();
 propellersover.src="media/menu/drop_propulsion_propellers.gif";

 var jetover=new Image();
 jetover.src="media/menu/drop_propulsion_jet.gif";

 var rocketover=new Image();
 rocketover.src="media/menu/drop_propulsion_rocket.gif";

 var davinciover=new Image();
 davinciover.src="media/menu/drop_pioneers_davinci.gif";

 var newtonover=new Image();
 newtonover.src="media/menu/drop_pioneers_newton.gif";

 var cayleyover=new Image();
 cayleyover.src="media/menu/drop_pioneers_cayley.gif";

 var lilienthalover=new Image();
 lilienthalover.src="media/menu/drop_pioneers_lilienthal.gif";

 var langleyover=new Image();
 langleyover.src="media/menu/drop_pioneers_langley.gif";

 var wrightover=new Image();
 wrightover.src="media/menu/drop_pioneers_wright.gif";

 var prandtlover=new Image();
 prandtlover.src="media/menu/drop_pioneers_prandtl.gif";

 var loungeover=new Image();
 loungeover.src="media/menu/drop_research_lounge.gif";

 var angleover=new Image();
 angleover.src="media/menu/drop_research_angle.gif";

 var camberover=new Image();
 camberover.src="media/menu/drop_research_camber.gif";

 var chordover=new Image();
 chordover.src="media/menu/drop_research_chord.gif";

 var curvatureover=new Image();
 curvatureover.src="media/menu/drop_research_curvature.gif";

 var tunnelover=new Image();
 tunnelover.src="media/menu/drop_research_tunnel.gif";

 var schoolover=new Image();
 schoolover.src="media/menu/drop_research_school.gif";

 var finalover=new Image();
 finalover.src="media/menu/drop_research_final.gif";

 var phenomenaover=new Image();
 phenomenaover.src="media/menu/drop_supersonic_phenomena.gif";

 var hypersonicover=new Image();
 hypersonicover.src="media/menu/drop_supersonic_hypersonic.gif";

 var forcesquizover=new Image();
 forcesquizover.src="media/menu/drop_forces_quiz.gif";

 var controlquizover=new Image();
 controlquizover.src="media/menu/drop_control_quiz.gif";

 var designquizover=new Image();
 designquizover.src="media/menu/drop_design_quiz.gif";

 var propulsionquizover=new Image();
 propulsionquizover.src="media/menu/drop_propulsion_quiz.gif";

 var supersonicquizover=new Image();
 supersonicquizover.src="media/menu/drop_supersonic_quiz.gif";

 var fluidquizover=new Image();
 fluidquizover.src="media/menu/drop_fluid_quiz.gif";

 var pioneersquizover=new Image();
 pioneersquizover.src="media/menu/drop_pioneers_quiz.gif";

 var blank=new Image();
 blank.src="media/spacer_clear.gif";
}

function clearmenus(){
	change('imgmenu0','nav_hom',0);
	change('imgmenu1','nav_for',0);
	change('imgmenu2','nav_con',0);
	change('imgmenu3','nav_des',0);
	change('imgmenu4','nav_flu',0);
	change('imgmenu5','nav_pro',0);
	change('imgmenu6','nav_pio',0);
	change('imgmenu7','nav_res',0);
	change('imgmenu8','nav_sup',0);
}

function glossary()
{
 var newWin=window.open('','glossary','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,width=450,height=170,resizable=0');
}