var browserType;

if (document.layers) {browserType = "nn4"}
if (document.all) {browserType = "ie"}
if (window.navigator.userAgent.toLowerCase().match("gecko")) {
 browserType= "gecko"
}

function hidea1() {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById("a1")');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById("a1")');
  else
     document.poppedLayer =   
        eval('document.layers["a1"]');
  document.poppedLayer.style.display = "none";
}

function showa1() {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById("a1")');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById("a1")');
  else
     document.poppedLayer = 
         eval('document.layers["a1"]');
  document.poppedLayer.style.display = "block";
}



function hidea2() {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById("a2")');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById("a2")');
  else
     document.poppedLayer =   
        eval('document.layers["a2"]');
  document.poppedLayer.style.display = "none";
}

function showa2() {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById("a2")');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById("a2")');
  else
     document.poppedLayer = 
         eval('document.layers["a2"]');
  document.poppedLayer.style.display = "block";
}

function hidea3() {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById("a3")');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById("a3")');
  else
     document.poppedLayer =   
        eval('document.layers["a3"]');
  document.poppedLayer.style.display = "none";
}

function showa3() {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById("a3")');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById("a3")');
  else
     document.poppedLayer = 
         eval('document.layers["a3"]');
  document.poppedLayer.style.display = "block";
}

function onetwo(){
  showa2();
  hidea1();
}
function twothree(){
  showa3();
  hidea2();
}
function threetwo(){
  hidea3();
   showa2();
}
function twoone(){
  showa1();
  hidea2();
}




function newImage( imgSrc ){

 var imgName = new Image();
 imgName.src = imgSrc;

 return imgName;

}

function change( imgName, imgLocation )
{
 document[imgName].src = imgLocation ;
}

var preloadFlag = false;
function loadImages()
{
 if (document.images)
 {
 //****Edit this list to include rollover state images ****
 //****Example: aboutus_over = newImage( "images/aboutus-over.gif" );
 a2leftimagebtn = newImage("none.gif");
 a2rightimagebtn = newImage("none.gif");

 preloadFlag = true;
 }
}