var speed=15000;
        var processed=new Array();
        for (i=1;i<=7;i++){
        processed[i-1]=new Image();
        processed[i-1].src="/App_Themes/Trafo/images/bg" + i + ".jpg";}
        var inc=0;
        function slideback(){
        if (inc<7)inc++;
        else inc=1;
        document.getElementById("backgroundImage").src ="/App_Themes/Trafo/images/bg" + inc + ".jpg";}
        if (document.all||document.getElementById)
        window.onload=new Function('setInterval("slideback()",speed)')

var resizeBg = function() { 
  var h = self.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
  var w = self.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;
  var elem = document.getElementById('backgroundImage');
  if (w > h) {
    elem.width = w;
    elem.height = w;
  } else {
    elem.height = h;
    elem.width = h;
  }
}