源代码：
<!DOCTYPE html><html><head><meta charset="UTF-8"><title></title></head><style type="text/css">*{margin: 0px auto;}#wk{width: 800px;height: 100px;border: 1px solid black;}#zb{height: 100px;background-color: red;float: left;}#yb{height: 100px;background-color: blue;float: left;}</style><body><div id="wk"><div id="zb" style="width: 50px;"></div><div id="yb" style="width: 750px;"></div></div></body><script type="text/javascript">var zb = document.getElementById(‘zb‘);var yb = document.getElementById(‘yb‘);var w = window.setInterval("Hua()",20);//调用函数，赋给一个变量方便清除调用function Hua(){if (parseInt(zb.style.width) == 750 ) {window.clearInterval(w); ??//清除调用return;//停止函数}zb.style.width = parseInt(zb.style.width)+4 +"px";yb.style.width = parseInt(yb.style.width)-4 +"px";}</script></html>效果如下：
JS实现进度条效果
原文地址：https://www.cnblogs.com/davis16/p/8376080.html