<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>JS链式运动</title>
<style type="text/css">
body {
margin: 0;
padding: 0;
}
ul,
li {
list-style: none;
}
li {
width: 200px;
height: 100px;
background-color: brown;
margin-bottom: 20px;
border: 4px solid#000;
filter: alpha(opacity, 30);
opacity: 0.3;
}
</style>
<script src="链式动画框架.js"> </script>
<script>
window.onload = function () {
var Li = document.getElementById('li1');
Li.onmouseover = function () {
startMove(Li,'width',400);
}
}
</script>
</head>
<body>
<ul>
<li id="li1"></li>
</ul>
</body>
</html>
//////////////////////////////////////////////////////////调用框架
function getStyle(obj, attr) {
if (obj.currentStyle) {
return obj.currentStyle[attr];
} else {
return getComputedStyle(obj, false)[attr];
}
}
function startMove(obj, attr, iTarget) {
clearInterval(obj.timer);
obj.timer = setInterval(function () {
//1. 去当前的值
var icur = 0;
if (attr = 'opacity') {
icur = Math.round((getStyle(obj, attr)) * 100);
} else {
icur = parseInt(getStyle(obj, attr));
}
//2. 算速度
var speed = (iTarget - icur) / 8;
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed);
//3. 检测停止
if (icur == iTarget) {
clearInterval(obj.timer);
} else {
if (attr == 'opacity') {
obj.style.filter = 'alpha(opacity:' + (icur + speed) + ')'; //IE浏览器整数几十
obj.style.opacity = (icur + speed) / 100; //火狐or chrome，小数零点几
} else {
obj.style[attr] = icur + speed + 'px';
}
}
}, 30)
}
icur = Math.round((getStyle(obj, attr)) * 100);
这句应该改成
icur=Math.round(parseFloat(getStyle(obj,attr))*100);