<!--
// flag if Netscape 4
var appVer = navigator.appVersion;
var netscape4 = (navigator.appName == "Netscape" && appVer.charAt(0) == "4") ? true : false;

if (document.images)
{
  // pre-cache rollover images
  var toxic_off = new Image(128,21)
  toxic_off.src = "graphics/buttons/btn_toxic_off.gif"
  var toxic_over = new Image(128,21)
  toxic_over.src = "graphics/buttons/btn_toxic_over.gif" 

  var what_off = new Image(128,21)
  what_off.src = "graphics/buttons/btn_what_off.gif"
  var what_over = new Image(128,21)
  what_over.src = "graphics/buttons/btn_what_over.gif" 
  
  var industries_off = new Image(128,21)
  industries_off.src = "graphics/buttons/btn_industries_off.gif"
  var industries_over = new Image(128,21)
  industries_over.src = "graphics/buttons/btn_industries_over.gif" 

  var builders_off = new Image(128,21)
  builders_off.src = "graphics/buttons/btn_builders_off.gif"
  var builders_over = new Image(128,21)
  builders_over.src = "graphics/buttons/btn_builders_over.gif" 

  var prevention_off = new Image(128,21)
  prevention_off.src = "graphics/buttons/btn_prevention_off.gif"
  var prevention_over = new Image(128,21)
  prevention_over.src = "graphics/buttons/btn_prevention_over.gif" 

  var articles_off = new Image(128,21)
  articles_off.src = "graphics/buttons/btn_articles_off.gif"
  var articles_over = new Image(128,21)
  articles_over.src = "graphics/buttons/btn_articles_over.gif" 
    
  var quote_off = new Image(128,21)
  quote_off.src = "graphics/buttons/btn_quote_off.gif"
  var quote_over = new Image(128,21)
  quote_over.src = "graphics/buttons/btn_quote_over.gif" 
      
  var microbe_off = new Image(128,21)
  microbe_off.src = "graphics/buttons/btn_microbe_off.gif"
  var microbe_over = new Image(128,21)
  microbe_over.src = "graphics/buttons/btn_microbe_over.gif" 
  
  var green_off = new Image(128,36)
  green_off.src = "graphics/buttons/btn_green_off.gif"
  var green_over = new Image(128,36)
  green_over.src = "graphics/buttons/btn_green_over.gif" 
  
  var test_off = new Image(128,21)
  test_off.src = "graphics/buttons/btn_test_off.gif"
  var test_over = new Image(128,21)
  test_over.src = "graphics/buttons/btn_test_over.gif" 
  
 
}

// swap images
function di(id,name)
{
  if (document.images)
    document.images[id].src=eval(name+".src");
}

var popWin = null;
var popHeight = 450;
var openString;

var availHeight;
availHeight = Math.round(screen.availHeight * 0.75);
if (availHeight > popHeight)
  popHeight = availHeight;


openString = "scrollbars=yes,resizable=yes,toolbar=no,menubar=yes,location=no,width=800,height=" + popHeight.toString() + ",top=40,";

function popup(url)
{
  if (popWin != null && !popWin.closed)
  {
    popWin.location = url;
  }
  else
  {
    if (netscape4)
      popWin = window.open(url, "NewWin", "scrollbars=yes,resizable=yes,toolbar=no,menubar=yes,location=no,width=800,height=450,top=40");
    else
      popWin = window.open(url, "NewWin", openString);
  }   
}

// -->