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)  {
    nav1 = newImage("/images/tier/aboutNav.jpg");
    nav2 = newImage("/images/tier/buildingNav.jpg");
    nav3 = newImage("/images/tier/recycleNav.jpg");
    nav4 = newImage("/images/tier/pollutionNav.jpg");
    nav5 = newImage("/images/tier/adminNav.jpg");
    nav6 = newImage("/images/tier/networkNav.jpg");
    nav7 = newImage("/images/tier/resourcesNav.jpg");

    navOver1 = newImage("/images/tier/aboutNav_over.jpg");
    navOver2 = newImage("/images/tier/buildingNav_over.jpg");
    navOver3 = newImage("/images/tier/recycleNav_over.jpg");
    navOver4 = newImage("/images/tier/pollutionNav_over.jpg");
    navOver5 = newImage("/images/tier/adminNav_over.jpg");
    navOver6 = newImage("/images/tier/networkNav_over.jpg");
    navOver7 = newImage("/images/tier/resourcesNav_over.jpg");

    navAct1 = newImage("/images/tier/aboutNavAct.jpg");
    navAct2 = newImage("/images/tier/buildingNavAct.jpg");
    navAct3 = newImage("/images/tier/recycleNavAct.jpg");
    navAct4 = newImage("/images/tier/pollutionNavAct.jpg");
    navAct5 = newImage("/images/tier/adminNavAct.jpg");
    navAct6 = newImage("/images/tier/networkNavAct.jpg");
    navAct7 = newImage("/images/tier/resourcesNavAct.jpg");

    navActOver1 = newImage("/images/tier/aboutNavAct_over.jpg");
    navActOver2 = newImage("/images/tier/buildingNavAct_over.jpg");
    navActOver3 = newImage("/images/tier/recycleNavAct_over.jpg");
    navActOver4 = newImage("/images/tier/pollutionNavAct_over.jpg");
    navActOver5 = newImage("/images/tier/adminNavAct_over.jpg");
    navActOver6 = newImage("/images/tier/networkNavAct_over.jpg");
    navActOver7 = newImage("/images/tier/resourcesNavAct_over.jpg");

    navAbout1 = newImage("/images/tier/aboutBlogNav.jpg");
    navAbout2 = newImage("/images/tier/aboutAuthorNav.jpg");

    navAboutOver1 = newImage("/images/tier/aboutBlogNav_over.jpg");
    navAboutOver2 = newImage("/images/tier/aboutAuthorNav_over.jpg");

    navAboutAct1 = newImage("/images/tier/aboutBlogNavAct.jpg");
    navAboutAct2 = newImage("/images/tier/aboutAuthorNavAct.jpg");

    navAboutOverAct1 = newImage("/images/tier/aboutBlogNavAct_over.jpg");
    navAboutOverAct2 = newImage("/images/tier/aboutAuthorNavACt_over.jpg");

    navAboutActAlt1 = newImage("/images/tier/aboutBlogNavAct_alt.jpg");

    navAboutActBld1 = newImage("/images/aboutBlogNavBld.jpg");
    navAboutActBldOver1 = newImage("/images/aboutBlogNavBld_over.jpg");

    arrowAlign();

    preloadFlag = true;
  }
}


function changeNav(name, over)  {
  var imgLoc = name;

  if(over == 1)  {
    imgLoc = imgLoc + "_over";
  }
  imgLoc = "/images/tier/" + imgLoc + ".jpg";

  change(name, imgLoc);
}

function aboutBlogAlt(show)  {
  var nv = document.getElementById("aboutBlogNavAct");

  if(show == 1)  {
    nv.className = "aboutBlogNavActAlt";
  }
  else  {
    nv.className = "aboutBlogNavAct";
  }
}

function arrowAlign()  {

  var ua = navigator.userAgent.toLowerCase();
  if (ua.indexOf('safari/') != -1)  {
    var i = 1;
    while(document.getElementById("recent"+i))  {
      var e = document.getElementById("recent"+i);
      e.className = "iconsa";
      i = i + 1;
    }

    i = 1;
    while(document.getElementById("earlier"+i))  {
      var e = document.getElementById("earlier"+i);
      e.className = "iconsa";
      i = i + 1;
    }
  }
}