鼠标划入，透明度一直往上涨。似乎无法判断到itarget==alpha这个情况。求大神帮忙看看代码
qq_弃子_0
2016-12-11 14:32
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>完美框架</title>
<style type="text/css">
body,ul{
margin: 0px;
padding: 0px;
}
ul,li{
list-style: none;
}
ul li{ width: 200px;
height: 100px;
float:left;
background: red;
margin-right: 20px;
opacity: 0.3;
}
</style>
<script type="text/javascript">
window.onload=function(){
var aLi =document.getElementsByTagName('li');
for (var i = aLi.length - 1; i >= 0; i--) {
aLi[i].timer=null;
aLi[i].alpha=0.3;
aLi[i].onmouseover=function(){
startMove(this,1.0);
}
aLi[i].onmouseout=function(){
startMove(this,0.3);
} }
}
//var timer=null;
function startMove(obj,iTarget){
clearInterval(obj.timer);
var speed=iTarget-obj.alpha;
obj.timer=setInterval(function(){
speed=speed>0?0.1:-0.1;
if (iTarget==obj.alpha) {
clearInterval(obj.timer);
}else{ obj.alpha+=speed;
obj.style.opacity=obj.alpha;
}
},30);
}
</script>
</head>
<body>
<ul>
<li></li>
<li></li>
<li></li>
</ul>
</body>
</html>1回答
-
- 694710752
- 2016-12-11 21:43:21
这样就可以了，
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>完美框架</title>
<style type="text/css">
body,ul{
margin: 0px;
padding: 0px;
}
ul,li{
list-style: none;
}
ul li{ width: 200px;
height: 100px;
float:left;
background: red;
margin-right: 20px;
filter:alpha(opacity:30);
opacity: 0.3;
}
</style>
<script type="text/javascript">
window.onload=function(){
var aLi =document.getElementsByTagName('li');
for (var i = aLi.length - 1; i >= 0; i--) {
aLi[i].timer=null;
aLi[i].alpha=30;
aLi[i].onmouseover=function(){
startMove(this,100);
}
aLi[i].onmouseout=function(){
startMove(this,30);
} }
}
function startMove(obj,iTarget){
clearInterval(obj.timer);
var speed=iTarget-obj.alpha; obj.timer=setInterval(function(){
speed=speed>0?10:-10;
if (iTarget==obj.alpha) {
clearInterval(obj.timer);
}else{ obj.alpha+=speed;
obj.style.filter='alpha(opacity:'+obj.alpha+')';
obj.style.opacity=obj.alpha/100;
}
},30);
}
</script>
</head>
<body>
<ul>
<li></li>
<li></li>
<li></li>
</ul>
</body>
</html>
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