var  percent = 70,
        timePeriod = 100;

function getBar() {
       var retBar = '';
       for(i = 0; i < percent; i++) {
                 retBar += "|";
        }
        return retBar;
}

function progressBar() {
 if(percent < 100) {
   percent = percent + 1
   window.status = "Loading : " + percent + "%" + " " + getBar();
   setTimeout ("progressBar()", timePeriod);
 } else {
   window.status = "Page Loaded!";
   document.body.style.display = "";
 }
}
progressBar();