<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<script type="text/javascript" src="float.js">
</script>
<script type="text/javascript">
window.onload = function ()
{
var ali = document.getElementsByTagName(‘li‘);
var flag = 0;
for(var i = 0; i < ali.length; i++)
{
fnshow(ali[i]);
}
function fnshow (li)
{
var odiv = li.getElementsByTagName(‘div‘)[0];
function fnshowone ()
{
setTimeout(function ()
{
flag = flag == 0?-50:0;
domove(odiv,‘top‘,10,80,flag,fnshowone);
},Math.round(Math.random()*2000+1000));
}
fnshowone();
};
};
</script>
<style>
ul{
margin:50px auto;
width:220px;
}
li{
display:inline-block;
width:100px;
height:50px;
overflow:hidden;
position:relative;
list-style-type:none;
}
div{
position:absolute;
left:0px;
top:0px;
}
img{
width:100px;
height:50px;
}
</style>
</head>
<body>
<ul>
<li>
<div>
<img src="img/5-1.jpg">
<img src="img/5-2.jpg">
</div>
</li>
<li>
<div>
<img src="img/5-3.jpg">
<img src="img/5-4.jpg">
</div>
</li>
<li>
<div>
<img src="img/5-5.jpg">
<img src="img/5-6.jpg">
</div>
</li>
<li>
<div>
<img src="img/5-7.jpg">
<img src="img/5-8.jpg">
</div>
</li>
<li>
<div>
<img src="img/5-9.jpg">
<img src="img/5-10.jpg">
</div>
</li>
<li>
<div>
<img src="img/5-11.jpg">
<img src="img/5-12.jpg">
</div>
</li>
<li>
<div>
<img src="img/5-13.jpg">
<img src="img/5-14.jpg">
</div>
</li>
<li>
<div>
<img src="img/5-15.jpg">
<img src="img/5-16.jpg">
</div>
</li>
</ul>
</body>
</html>
function getstyle(obj,attr)
{
return obj.currentStyle?obj.currentStyle[attr]:getComputedStyle(obj)[attr];
}
function domove (obj,attr,step,frequency,target,endfn)
{
step = parseInt(getstyle(obj,attr))<target?step:-step;
clearInterval(obj.timer);
obj.timer = setInterval( function ()
{
var speed = parseInt(getstyle(obj,attr)) + step;
if(step>0&&speed>target||step<0&&speed<target)
{
speed = target;
}
obj.style[attr] = speed + ‘px‘;
if( speed == target )
{
clearInterval(obj.timer);
endfn&&endfn();
}
},frequency);
};
function opacity(obj,step,target,frequency,endfn)
{
var currentOpacity = getstyle(obj,‘opacity‘) * 100;
step = currentOpacity < target?step:-step;
clearInterval(obj.opacity)
obj.opacity = setInterval (function ()
{
currentOpacity = getstyle(obj,‘opacity‘) *100;
var nextOpacity = currentOpacity + step;
if(step>0&& nextOpacity>target || step<0&& nextOpacity < target )
{
nextOpacity = target;
}
obj.style.opacity = nextOpacity/100;
obj.style.filter = ‘alpha(opacity:)‘ + nextOpacity +‘)‘;
if(nextOpacity == target )
{
clearInterval(obj.opacity);
endfn&&endfn();
}
},frequency);
};
function shake(obj,attr,endfn)
{
if( obj.shaked ) { return; }
obj.shaked = true;
var num = 0;
var timer = null;
var arr = [];
var pos = parseInt(getstyle(obj,attr));
for( var i = 20; i > 0; i-=2 )
{
arr.push(i,-i);
}
arr.push(0);
clearInterval(obj.shake);
obj.shake = setInterval(function ()
{
obj.style[attr] = pos + arr[num] +‘px‘;
num++;
if(num==arr.length)
{
clearInterval(obj.shake);
endfn&&endfn();
obj.shaked = false;
}
},50);
};
时间： 2024-09-29 16:35:10