HTML代码

<div class="banner" id="b04">
  <ul>
    <li class="slider-item"><a target="_blank"  href="#"><img src="img/01.jpg" alt="小米进军泡面界，5块一桶还包邮？雷军回应；92女生：360关闭直播不诚恳，需周鸿祎道歉；传阿里即将控股A站|早报" width="640" height="480" ><span class="slider-title"><em>小米进军泡面界，5块一桶还包邮？雷军回应；92女生：360关闭直播不诚恳，需周鸿祎道歉；传阿里即将控股A站|早报</em></span></a></li>
    <li class="slider-item"><a target="_blank"  href="#"><img src="img/02.jpg" alt="如果你是创业者，你或许应该琢磨琢磨投资人是怎么想的" width="640" height="480" ><span class="slider-title"><em>如果你是创业者，你或许应该琢磨琢磨投资人是怎么想的</em></span></a></li>
    <li class="slider-item"><a target="_blank"  href="#"><img src="img/03.jpg" alt="傅盛：生物学思维给我的四个启示" width="640" height="480" ><span class="slider-title"><em>傅盛：生物学思维给我的四个启示</em></span></a></li>
    <li class="slider-item"><a target="_blank"  href="#"><img src="img/04.jpg" alt="重仓何小鹏" width="640" height="480" ><span class="slider-title"><em>重仓何小鹏</em></span></a></li>
    <li class="slider-item"><a target="_blank"  href="#"><img src="img/05.jpg" alt="深潜：王石的创业" width="640" height="480" ><span class="slider-title"><em>深潜：王石的创业</em></span></a></li>
  </ul>
<div class="progress"></div>
<a href="javascript:void(0);" class="unslider-arrow04 prev"><img class="arrow" id="al" src="img/arrowl.png" alt="prev" width="20" height="35"></a>
<a href="javascript:void(0);" class="unslider-arrow04 next"><img class="arrow" id="ar" src="img/arrowr.png" alt="next" width="20" height="37"></a>
</div>

引入插件

<script src="js/jquery-1.11.1.min.js"></script>
<script src="js/unslider.min.js"></script>

Javascript代码

$(document).ready(function(e) {
	var progress = $(".progress"),li_width = $("#b04 li").length;
    var unslider04 = $('#b04').unslider({
		dots: true,
		complete:function(index){//自己添加的，官方没有
			progress.animate({"width":(100/li_width)*(index+1)+"%"});
		}
	}),

	data04 = unslider04.data('unslider');
	$('.unslider-arrow04').click(function() {
        var fn = this.className.split(' ')[1];
        data04[fn]();
    });
});

关键点（自己扩展的）

complete:function(index){//自己添加的，官方没有
	progress.animate({"width":(100/li_width)*(index+1)+"%"});
}