dt=new Date();
document.onreadystatechange=function() {
  if (document.readyState=="complete") {
    var dur = (new Date() - dt)/1000;
    var txt = document.createTextNode("Page Load Time = "+dur+"");
    var div = document.createElement("div"); 
    div.appendChild(txt);
    div.style.color = "white";  
//    document.body.insertBefore(txt,document.body.firstChild); 
//    document.body.appendChild(div);
  }
}