// JavaScript Document

window.onload = function(evt) {
    window.onresize = handleBG;
    var e = evt ? evt : window.event;
    
  if (window.ActiveXObject && !window.XMLHttpRequest) {
      var logo = document.getElementById("logo");
          logo.style.textAlign = "center";
      var aEl = logo.getElementsByTagName("A")[0];
      var imgEl = aEl.getElementsByTagName("IMG")[0];
          imgEl.src = "Images/e-for-forest.jpg";
      var nav = document.getElementById("sitenav");
      var ulEl = nav.getElementsByTagName("UL")[0];
          ulEl.style.marginLeft = "auto";
  }  
  handleBG(e);
}

function handleBG(evt) {
  try {
    var evt = evt ? evt : window.event;
    if (window.event)
      evt.cancelBubble = true;
    else
      evt.stopPropagation();
    var srcEl = evt.src ? evt.src : evt.srcElement;
  } catch (er) {
  }
  var height, bHeight;
  var body = window.document.body;
  if (window.innerHeight) {
     height = window.innerHeight;
  } else if (body.parentElement.clientHeight) {
     height = body.parentElement.clientHeight;
    } else if (body && body.clientHeight) {
     height = body.clientHeight;
    }

    var cHeight = height ? height : false;
    
    if (document.all && cHeight && cHeight < 595) {
        bHeight = "center -250px";
    } else if (cHeight && cHeight < 595) {
        bHeight = "center -130px";
    }
    if (bHeight)
        body.style.backgroundPosition = bHeight;
    else
        body.style.backgroundPosition = 'center center';
}