能吧代码发上来么；没代码看
发代码.......thanks
4 回答
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
*{
margin: 0;
padding: 0;
}
ul li{
width: 200px;
height: 100px;
background: lawngreen;
margin-bottom: 20px;
border: 4px solid brown;
filter: alpha(opacity:30);
opacity: 0.3;
}
</style>
<script src="index.js"></script>
<script>
window.onload=function(){
var oLi=document.getElementById('li1');
oLi.onmouseover=function(){
startMove(oLi,{width:201,height:200,opacity:100});
}
oLi.onmouseout=function(){
startMove(oLi,{width:200,height:100,opacity:30});
}
}
</script>
</head>
<body>
<ul>
<li id="li1"></li>
</ul>
</body>
</html>
/**
* Created by HL on 2016/1/2.
*/
function getStyle(obj, attr) {
if (obj.currentStyle) {
return obj.currentStyle[attr];
} else {
return getComputedStyle(obj, false)[attr];
}
}
function startMove(obj, json, fn) {
var flag = true;
clearInterval(obj.timer);
obj.timer = setInterval(function () {
for (var attr in json) {
//1、获取当前值
var icur = 0;
if (attr == 'opacity') {
icur = Math.round(parseFloat(getStyle(obj, attr)) * 100.0);//四舍五入
} else {
icur = parseInt(getStyle(obj, attr));
}
//2、计算速度
var speed = (json[attr] - icur) / 8;
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed);
//3、检测停止
if (icur != json[attr]) {
flag = false;
}
if (attr == 'opacity') {
obj.style.filter = 'alpha(opacity:' + (icur + speed) + ')';
obj.style.opacity = (icur + speed) / 100.0;
} else {
obj.style[attr] = icur + speed + 'px';
}
if(flag){
clearInterval(obj.timer);
if(fn){
fn();
}
}
}
}, 30);
}
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