qq_小狸猫_03724105
2016-10-18 09:08
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Document</title> <style type="text/css"> *{ margin: 0; padding: 0; } ul,li{ list-style: none; } ul li{ width: 200px; height: 100px; background: yellow; margin-bottom:20px; filter: alpha(opacity:30); border: 4px solid #000; filter: alpha(opacity:30); opacity: 0.3; } </style> <script> window.onload=function(){ var Li1=document.getElementById('li1'); var Li2=document.getElementById('li2'); Li1.onmouseover=function(){ startMove(this,'opacity',100); } Li1.onmouseout=function(){ startMove(this,'opacity',30); } } function getStyle(obj,attr){ if(obj.currentStyle){ return obj.currentStyle[attr]; }else{ return getComputedStyle(obj,false)[attr]; } } //var timer=0; var alpha=30; function startMove(obj,attr,iTarget){ clearInterval(obj.timer); obj.timer=setInterval(function(){ var icur=0; if(attr=='opacity'){ icur=Math.round(parseFloat(getStyle(obj.attr))*100); }else{ icur=parseInt(getStyle(obj.attr)); } //var icur=parseInt(getStyle(obj,attr)); var speed=(iTarget-icur)/8; speed=speed>0?Math.ceil(speed):Math.floor(speed); if(icur==iTarget){ clearInterval(obj.timer); }else{ if(attr=='opacity'){ obj.style.filter='alpha(opacity:'+(icur+speed)+')'; obj.style.opacity=(icur+speed)/100; }else{ obj.style[attr]=icur+speed+'px'; } } },30) } </script> </head> <body> <ul> <li id="li1"></li> </ul> </body> </html>
这是提示的错误,鼠标滑过就提示这个,然后背景色也没什么变化,实在不知道什么原因啊
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
ul,li{
list-style: none;
}
ul li{
width: 200px;
height: 100px;
background: yellow;
margin-bottom:20px;
filter: alpha(opacity:30);
border: 4px solid #000;
filter: alpha(opacity:30);
opacity: 0.3;
}
</style>
<script>
window.onload=function(){
var Li1=document.getElementById('li1');
var Li2=document.getElementById('li2');
Li1.onmouseover=function(){
startMove(this,'opacity',100);
}
Li1.onmouseout=function(){
startMove(this,'opacity',30);
}
}
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
}else{
return getComputedStyle(obj,false)[attr];
}
}
//var timer=0;
var alpha=30;
function startMove(obj,attr,iTarget){
clearInterval(obj.timer);
obj.timer=setInterval(function(){
var icur=0;
if(attr=='opacity'){
icur=Math.round(parseFloat(getStyle(obj.attr))*100); // 这行代码写错了getStyle(obj.attr)应该是getStyle(obj,attr) 是调用用 , 号不是.号
}else{
icur=parseInt(getStyle(obj.attr)); // 这个也是 自己改过来
}
//var icur=parseInt(getStyle(obj,attr));
var speed=(iTarget-icur)/8;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if(icur==iTarget){
clearInterval(obj.timer);
}else{
if(attr=='opacity'){
obj.style.filter='alpha(opacity:'+(icur+speed)+')';
obj.style.opacity=(icur+speed)/100;
}else{
obj.style[attr]=icur+speed+'px';
}
}
},30)
}
</script>
</head>
<body>
<ul>
<li id="li1"></li>
</ul>
</body>
</html>
总觉得你似乎没有认真看啊,虽然我也没认真看就是了,比如,你定义了Li1和Li2,但是只用到Li1,又比如getStyle()方法的参数,你有时候写getStyle(obj.attr),有时候写getStyle(obj,attr),这两个的意义完全不一样了啊,先去吃饭,我也还没开始自己写,你自己再仔细看一下自己的代码吧
你没有currentStyle吧?不存在的怎么用if进行判断啊
JS动画效果
113925 学习 · 1443 问题
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