有點懵逼我，不加random我的透明度變化也正常
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>無標題文檔</title>
<style>
*{margin:0;padding:0;
}
ul,li{
list-style:none;
}
ul li{
width:200px;
height:100px;
background:yellow;
margin-bottom:20px;
? ? border:4px solid black;
filter:alpha(opacity:30);
opacity:0.3;
}
</style>
<script>
window.onload=function(){
? var onli1=document.getElementById('li1');
? ?onli1.onmouseover=function(){
?startmove(this,100,'opacity');
?}
? ?onli1.onmouseout=function(){
?startmove(this,30,'opacity');
?}
/*var onLi=document.getElementsByTagName('li');
? ?for(var i=0;i<onLi.length;i++){
? onLi[i].timer=null;
? onLi[i].onmouseover=function(){
? startmove(this,400);
? }
? onLi[i].onmouseout=function(){
? startmove(this,200);
? }
? }*/
}
alert(0.07*100)
function startmove(obj,iTarget,attr){
clearInterval(obj.timer);
obj.timer=setInterval(function(){
var irc=0;
if(attr=='opacity'){
icr=parseFloat(getStyle(obj,attr))*100;
}else{
icr=parseInt(getStyle(obj,attr));}
var speed=(iTarget-icr)/20;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if(icr==iTarget){
clearInterval(obj.timer);
}else{
if(attr=='opacity'){
obj.style.filter='alpha(opacity:'+(icr+speed)+')';
obj.style.opacity=(icr+speed)/100;
}else{
obj.style[attr]=icr+speed+'px'; }
}
},30)
}
function getStyle(obj,attr)
{
if(obj.currentStyle){
return obj.currentStyle[attr];
}else{
return getComputedStyle(obj,false)[attr];
}
}
</script>
</head>
<body>
<ul>
<li id='li1'></li>
</ul>
</body>
</html>
能幫我看下嗎
2017-07-12
寫錯了，應該是round。。