function viewport(){
  var viewportwidth;
  var viewportheight;
  var viewportratio;
  var picwidth = 1600;
  var picheight = 900;
  var picratio = picwidth / picheight;

  // the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight
  if (typeof window.innerWidth != 'undefined') {
    viewportwidth = window.innerWidth,
    viewportheight = window.innerHeight
  }

  // IE6 in standards compliant mode (i.e. with a valid doctype as the first line in the document)
  else if (typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth != 'undefined' && document.documentElement.clientWidth != 0) {
    viewportwidth = document.documentElement.clientWidth,
    viewportheight = document.documentElement.clientHeight
  }

  // older versions of IE
  else {
    viewportwidth = document.getElementsByTagName('body')[0].clientWidth,
    viewportheight = document.getElementsByTagName('body')[0].clientHeight
  }
  
  viewportratio = viewportwidth / viewportheight;
  
  if (picratio < viewportratio) {
    $('div#page img').css('height', 'auto');
    $('div#page img').css('width', viewportwidth + 'px');
  };
  
  if (picratio > viewportratio) {
    $('div#page img').css('height', viewportheight + 'px');
    $('div#page img').css('width', 'auto');
  };
}


function dom_init() {
  setInterval('viewport()', 100);
}