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038-多个div半透明缓动.html
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038-多个div半透明缓动.html
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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style>
#div1 div{width:100px; height:100px; background:red; margin-top:50px; filter:alpha(opacity=30); opacity:0.3;}
</style>
<script>
window.onload = function()
{
var oDiv1 = document.getElementById("div1");
var aDiv = oDiv1.getElementsByTagName("div");
for(var i = 0; i < aDiv.length; i++)
{
aDiv[i].alpha = 30;
aDiv[i].onmouseover = function()
{
startMove(this,100);
}
aDiv[i].onmouseout = function()
{
startMove(this,30);
}
}
}
function startMove(obj, iTarget)
{
clearInterval(obj.timer);
obj.timer = setInterval(function(){
var ispeed = (iTarget - obj.alpha) / 8;
ispeed = ispeed > 0 ? Math.ceil(ispeed):Math.floor(ispeed);
if(ispeed == iTarget)
{
clearInterval(obj.timer);
}
else
{
obj.alpha += ispeed;
obj.style.filter = "alpha(opacity="+obj.alpha+")";
obj.style.opacity = obj.alpha / 100;
}
},30);
}
</script>
</head>
<body>
<div id="div1">
<div></div>
<div></div>
<div></div>
</div>
</body>
</html>