<!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>js淡入淡出的图片</title>
<style>
#img{display:block;margin:0 auto; opacity:0.3; filter:alpha(opacity=30); width:200px; height:300px;}
</style>
<script>
window.onload=function(){
var oImg=document.getElementById(‘img‘);
var iTimer=0;
oImg.onmouseover=function(){
startMove(this,100,10);
}
oImg.onmouseout=function(){
startMove(this,30,-10);
}
function startMove(obj, iTarget, iSpeed) {
clearInterval(iTimer);
var iCur=0;
iTimer = setInterval(function() {
iCur=Math.round(css(obj,‘opacity‘)*100);
if (iCur == iTarget) {
clearInterval(iTimer);
} else {
obj.style.opacity=(iCur+iSpeed)/100;
obj.style.filter=‘alpha(opacity=‘+(iCur+iSpeed)+‘)‘; //加括号防止转换成字符串
}
}, 30);
}
function css(obj,attr){ //获取元素的css任何属性
if(obj.currentStyle){
return obj.currentStyle[attr];
}else{
return getComputedStyle(obj,false)[attr];
}
}}
</script>
</head>
<body>
<img src=‘cat.jpg‘ id=‘img‘/>
</body>
</html>
时间： 2024-10-11 07:32:28