鼠标移上小图片，大图片从小图片的中间向两边拉开显示js效果

u010148070 2013-08-03 12:20:57

一个图片列表有5张小图片，鼠标移上去，如果对应的小图片里又大图的话，那么这张大图就小图片的中间向两边拉开显示，且铺满覆盖住这5张小图片，鼠标离开后，又会收缩回小图片里面，怎么实现？求这种效果，谢谢大神了。

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u010148070 2013-08-04

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http://jsbin.com/uqacup/110/edit 就是一个图片列表，有一种是上下滑动显示的，有一种是垂直居中Ul上下拉开显示的，怎么实现的？

<!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>无标题文档</title>
<style>
ul,li{
list-style:none;
padding:0;
margin:0;
}
#ul1{
width:1000px;
height:300px;
overflow:hidden;
margin:10px auto;
position:relative;
}
#ul1 li{
width:190px;
height:300px;
float:left;
margin-right:10px;
}
.sbox{
width:190px;
height:300px;
overflow:hidden;
position:relative;
}
.sma{
height:600px;
overflow:hidden;
color:#fff;
position:absolute;
top:0;
}
.a1{
background:#ff6600;
width:190px;
height:300px;
overflow:hidden;
}
.a2{
background:#377f03;
width:190px;
height:300px;
overflow:hidden;
}
.bigBox{
height:0px;
width:1000px;
background:#990000;
position:absolute;
z-index:2;
top:0;
left:0;
overflow:hidden;
}
.bigBox img{
	width:1000px;
	height:300px;
}
</style>
<script>
//class
function getByClass(oParent, sClass)
{
var aEle=oParent.getElementsByTagName('*');
var aResult=[];
var re=new RegExp('\\b'+sClass+'\\b', 'i');
var i=0;
for(i=0;i<aEle.length;i++)
{
if(re.test(aEle[i].className))
{
aResult.push(aEle[i]);
}
}
return aResult;
}
//getstyle
function getStyle(obj, attr)
{
if(obj.currentStyle)
{
return obj.currentStyle[attr];
}
else
{
return getComputedStyle(obj, false)[attr];
}
}
//move
function startMove(obj, json, fn)
{
clearInterval(obj.timer);
obj.timer=setInterval(function (){
var bStop=true;
for(var attr in json)
{
var iCur=0;

if(attr=='opacity')
{
iCur=parseInt(parseFloat(getStyle(obj, attr))*100);
}
else
{
iCur=parseInt(getStyle(obj, attr));
}

var iSpeed=(json[attr]-iCur)/8;
iSpeed=iSpeed>0?Math.ceil(iSpeed):Math.floor(iSpeed);

if(iCur!=json[attr])
{
bStop=false;
}

if(attr=='opacity')
{
obj.style.filter='alpha(opacity:'+(iCur+iSpeed)+')';
obj.style.opacity=(iCur+iSpeed)/100;
}
else
{
obj.style[attr]=iCur+iSpeed+'px';
}
}
if(bStop)
{
clearInterval(obj.timer);

if(fn)
{
fn();
}
}
}, 30)
}

window.onload=function(){
var aUl=document.getElementById('ul1');
var aLi=aUl.getElementsByTagName('li');
var sImg=getByClass(aUl,'sma');
var i=0;
var iNow=0;
var iNow2=0;
	for(i=0;i<aLi.length;i++){
		aLi[i].index=i;
		aLi[i].onmouseover=function(){
			var aImg=this.getElementsByTagName('img');
			var bImg=getByClass(this,'bigBox');
			iNow=this.index;
			
			if(aImg.length>1){
				if(bImg){
					startMove(bImg[iNow],{height:300});
				}
			}else{
				startMove(sImg[iNow],{top:-aLi[0].offsetHeight})
			}
		};
		aLi[i].onmouseout=function(){
			var aImg=this.getElementsByTagName('img');
			var bImg=getByClass(this,'bigBox');
			iNow=this.index;
			
			if(aImg.length>1){
				startMove(bImg[iNow],{height:0});
			}else{
				startMove(sImg[iNow],{top:0})
			}
		};
	};
};
</script>
</head>

<body>
<ul id="ul1">
<li>
<div class="sbox">
<div class="sma">
<div class="a1">正常显示层</div>
<div class="a2">上下切换显示层</div>
</div>
</div>
</li>
<li>
<div class="a1">正常显示层</div>
<div class="bigBox">从ul的中间上下拉开显示层</div>
</li>
<li>
<div class="sbox">
<div class="sma">
<div class="a1">正常显示层</div>
<div class="a2">上下切换显示层</div>
</div>
</div>
</li>
<li>
<div class="sbox">
<div class="sma">
<div class="a1">正常显示层</div>
<div class="a2">上下切换显示层</div>
</div>
</div>
</li>
<li>
<div class="a1">正常显示层</div>
<div class="bigBox">从ul的中间上下拉开显示层</div>
</li>
</ul>
</body>
</html>

似梦飞花 2013-08-03

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<!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>无标题文档</title> <style type="text/css"> img{ width:40px; height:40px; } div{ width:240px; height:40px; } </style> <script type="text/javascript"> function init(){ var imgs=document.images; for(var i=0;i<imgs.length;i++){ imgs[i].onmouseover=function(){ var img=new Image(); img.src=this.src; var p=this.parentNode; img.style.width='240px'; img.style.height='40px'; img.style.position='absolute'; img.style.left='0px'; p.appendChild(img); img.onmouseout=function(){ p.removeChild(img); } } } } window.onload=init; </script> </head> <body> <div> <img src="a.jpg" /> <img src="biggerl.jpg" /> <img src="border.png" /> <img src="building.jpg" /> <img src="close.png" /> </div> </body> </html> 不是很明白你的意思