js多物体运动之淡入淡出效果

<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
</head>
<style>
div{width:200px;height: 200px;margin: 20px;float: left;
background-color: red;filter:alpha(opacity:30);opacity: 0.3;} </style>
<body>
<div></div>
<div></div>
<div></div>
<div></div> </body>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
window.onload=function(){
var oDiv=document.getElementsByTagName('div');
for(var i=0;i<oDiv.length;i++){
oDiv[i].alpha=30;
oDiv[i].onmouseover=function(){ startMove(this,100);
};
oDiv[i].onmouseout=function(){
startMove(this,30);
};
} }; function startMove(obj,iTarget){
clearInterval(obj.timer);
obj.timer=setInterval(function(){
var speed=(iTarget-obj.alpha)/6;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if(obj.alpha==iTarget){
clearInterval(obj.timer);
}else{
obj.alpha+=speed;
obj.style.filter='alpha(opacity:'+obj.alpha+')';
obj.style.opacity=obj.alpha/100;
}
},30);
} </script>
</html>

js多物体运动之淡入淡出效果

上一篇:多语言架构下如何正确的使用SQL视图


下一篇:NotificationSetUtilDemo【判断APP通知栏权限是否开启,以及如何跳转到应用程序设置界面】