HTML： 

 <p class="progress"><p class="progress_bar"> </p><p class="progress_bg"></p><p class="progress_btn"></p><p class="text">0%</p></p>

JS：

$(document).ready(function(){var tag = false,dx = 0,left = 0,bgleft = 0;$('.progress_btn').mousedown(function(e) {dx = e.pageX - left;tag = true;});$(document).mouseup(function(e) {tag = false;});$('.progress_btn').mousemove(function(e) {//鼠标移动if (tag) {left = e.pageX - dx;if (left <= 0) {left = 0;}else if (left > 300) {left = 300;}$('.progress_btn').css('left', left);$('.progress_bar').animate({width:left},1);$('.text').html(parseInt((left/300)*100) + '%');}});$('.progress_bg').click(function(e) {//鼠标点击if (!tag) {bgleft = $('.progress_bg').offset().left;left = e.pageX - bgleft;if (left <= 0) {
left=0;}else if (left > 300) {left = 300;}$('.progress_btn').css('left', left);$('.progress_bar').animate({width:left},300);//$('.text').html(parseInt((left/300)*100) + '%');}
//  alert(left);});});

CSS：

.progress{position: absolute; width:300px;margin:100px auto;}
.progress_bg{height: 10px;width:300px; border: 1px solid #ddd; border-radius: 5px;overflow: hidden;background-color:#f2f2f2;}/**/
.progress_bar{ width: 0; height: 10px; border-radius: 5px;background: #5FB878;position: absolute; top:1px;}/* position: absolute;*/
.progress_btn{width: 20px; height: 20px; border-radius: 5px; position: absolute;background:#fff; left: 0px; margin-left: -10px; top:-5px; cursor: pointer;border:1px #ddd solid;box-sizing:border-box;}
.progress_btn:hover{border-color:#F7B824;}