<script>
$(function() {
$("body").append($("<div></div>").attr("id", "progress"));
$("#progress").width((50 + Math.random() * 30) + "%");
});
$(window).load(function() {
$("#progress").width("101%").delay(300).fadeOut(400);
});
</script>

#progress {position: fixed;
    z-index: 100;
    top: 0;
    left: -6px;
    width: 1%;
    height: 3px;
    background: #ff0000;
    border-radius: 1px;
    transition: width 500ms ease-out,opacity 400ms linear;
}