// /////////////////
// footer positioning
// /////////////////

function getWindowHeight() {
 var windowHeight = 0;
 if (typeof(window.innerHeight) == 'number') {
  windowHeight = window.innerHeight;
 }
 else {
  if (document.documentElement && document.documentElement.clientHeight) {
   windowHeight = document.documentElement.clientHeight;
  }
  else {
   if (document.body && document.body.clientHeight) {
    windowHeight = document.body.clientHeight;
   }
  }
 }
 return windowHeight;
}
function setFooter() {
 if (document.getElementById) {
  var windowHeight = getWindowHeight();
  if (windowHeight > 0) {
   var contentHeight = document.getElementById('content').offsetHeight;
   var footerElement = document.getElementById('footer');
   var footerHeight  = footerElement.offsetHeight;
   if (windowHeight - (contentHeight + footerHeight) >= 0) {
    footerElement.style.top = (windowHeight - (contentHeight + footerHeight)) + 'px';
   }
   else {
    footerElement.style.top = '0px';
   }
  }
 }
}
window.onload = function() {
 setFooter();
}
window.onresize = function() {
 setFooter();
}

// /////////////////
// images section
// /////////////////

userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function findElement(n,ly) {
  if (browserVers < 4)		return document[n];
  var curDoc = ly ? ly.document : document;
  var elem = curDoc[n];
  if (!elem) {
    for (var i=0;i<curDoc.layers.length;i++) {
      elem = findElement(n,curDoc.layers[i]);
      if (elem) return elem;
    }
  }
  return elem;
}

function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImages() {
  if (document.images) {
    var img;
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      img = null;
      if (document.layers) {
        img = findElement(changeImages.arguments[i],0);
      }
      else {
        img = document.images[changeImages.arguments[i]];
      }
      if (img) {
        img.src = changeImages.arguments[i+1];
      }
    }
  }
}

var preloadFlag = false;
function preloadImages() {

  setFooter(); //call function for footer location

  if (document.images) {
    Home_over = newImage("/assets/Home-over.jpg");
    services_over = newImage("/assets/services-over.jpg");
    portfolio_over = newImage("/assets/portfolio-over.jpg");
    essays_over = newImage("/assets/essays-over.jpg");
    about_over = newImage("/assets/about-over.jpg");
    contact_over = newImage("/assets/contact-over.jpg");
    preloadFlag = true;
  }
}