代码简介：
类似于点击小图预览图片的功能，在淘宝网可以见到这种图片展示技巧，当用鼠标点击小图的时候，大图会从小图的位置突然弹出来，而且慢慢放大，至于这么大到什么程序，这个需要由您来设定，实际上本特效还是非常有用的。
代码内容：
View Code
<!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>
<title>JavaScript点小图弹出放大图片的代码 - www.webdm.cn</title>
<meta http-equiv="content-type" content="text/html;charset=gb2312">
<style type="text/css">
*{margin:0;padding:0;}
img{border:0;border:1px #ccc solid;}
body{font-size:12px;background:#fff;}
a{color:#333;text-decoration:none;}
a:hover{text-decoration:none;}
.main{position:relative;width:640px;margin:20px auto;}
.left{float:left;width:220px;}
/*www.webdm.cn*/
.left li{float:left;margin-right:8px;list-style:none;}
.right{float:right;width:400px;}
.right a{float:left;margin-right:10px;padding:5px 10px;}
.right a:hover{background:#ff9000;color:#fff;}
.left a:hover{position:relative;top:1px;left:1px;}
#imglink{float:none;margin:0;padding:0;}
#links,#more{margin-top:400px;}
.fxImg{position:absolute;left:0;top:0;background:#fff;display:none;cursor:pointer;padding:5px;}
</style>
<script type="text/javascript">
ldh={
$:function(o){return typeof o=="string"?document.getElementById(o):o},
$$:function (o,p){return (p==undefined?document:this.$(p)).getElementsByTagName(o)},
on:function(o,type,fn){o.attachEvent?o.attachEvent('on'+type,function(){fn.call(o)}):o.addEventListener(type,fn,false);return this},
css:function(who,key){
if(who.style[key]!='')return who.style[key];
if(!!window.ActiveXObject)return who.currentStyle[key];
return document.defaultView.getComputedStyle(who,"")
.getPropertyValue(key.replace(/([A-Z])/g,"-$1").toLowerCase());
},
pos:function(who){
var p=ldh.$(who),x=0,y=0;
while(p&&!(/html|body/i.test(p.tagName))){x+=p.offsetLeft;y+=p.offsetTop;p=p.offsetParent;};
return {'x':x,'y':y};
},
move:function(who,attr,val,s,fn){
who=this.$(who);
var isbg=/backgroundPosition/i.test(attr)
,fm=parseInt(this.css(who,attr))||0
,by=isbg?((who.getAttribute('bg_y')||0)+'px'):'';
if(this.css(who,attr)==undefined&&isbg)fm=200;
var iFx=this.fx(fm,val,s);
clearInterval(who['timer_'+attr]);
who['timer_'+attr]=setInterval(function (){
var v=iFx();
who.style[attr]=v+'px '+by;
if(v==val){ fn&&fn();clearInterval(who['timer_'+attr]);};
},18);return this;
},
fx:function(form,to,s){
var m=Math[form<to?'ceil':'floor'];
return function (){return form+=m((to-form)*(s||0.4))};
}
};
ldh.on(window,'load',function (){
var fxImg=document.createElement('IMG');
fxImg.className='fxImg';
document.body.appendChild(fxImg);
var pos=ldh.pos('preview');
var links=ldh.$$('A',ldh.$('menuPic'));
for (var i=0;i<links.length;++i ) {
var $=links[i],$p=ldh.$$('IMG',$)[0],mypos=ldh.pos($p),url=$.href
,attr={href:'javascript:void(0);',imgsrc:$p.src,x:mypos.x,y:mypos.y,'url':url};
for (var Id in attr){$[Id]=attr[Id]}
ldh.on($,'click',function (){
fxImg.src=this.imgsrc;
var $$=fxImg.style,This=this;
$$.left=this.x+'px';
$$.top=this.y+'px';
$$.display='block';
$$.height='140px';
fxImg.onclick=function (){location=This.url};
ldh.move(fxImg,'left',pos.x).move(fxImg,'top',pos.y,0.4,function(){ldh.move(fxImg,'height',400)});
});
}
})
</script>
</head>
<body>
<div class="main">
<div class="left" id="menuPic">
<ul>
<li><a href="http://www.webdm.cn" ><img src="http://www.webdm.cn/images/wall1_s.jpg" /></a></li>
<li><a href="http://www.webdm.cn"><img src="http://www.webdm.cn/images/wall2_s.jpg" /></a></li>
<li><a href="http://www.webdm.cn"><img src="http://www.webdm.cn/images/wall3_s.jpg" /></a></li>
</ul>
</div>
</div>
</body>
</html>
<br />
<p><a href="http://www.webdm.cn">网页代码站</a> - 最专业的网页代码下载网站 - 致力为中国站长提供有质量的网页代码！</p>
代码来自：http://www.webdm.cn/webcode/8f9b3ef7-bca1-42ef-b0af-ac43e83e9fc6.html
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>JavaScript点小图弹出放大图片的代码 - www.webdm.cn</title>
<meta http-equiv="content-type" content="text/html;charset=gb2312">
<style type="text/css">
*{margin:0;padding:0;}
img{border:0;border:1px #ccc solid;}
body{font-size:12px;background:#fff;}
a{color:#333;text-decoration:none;}
a:hover{text-decoration:none;}
.main{position:relative;width:640px;margin:20px auto;}
.left{float:left;width:220px;}
/*www.webdm.cn*/
.left li{float:left;margin-right:8px;list-style:none;}
.right{float:right;width:400px;}
.right a{float:left;margin-right:10px;padding:5px 10px;}
.right a:hover{background:#ff9000;color:#fff;}
.left a:hover{position:relative;top:1px;left:1px;}
#imglink{float:none;margin:0;padding:0;}
#links,#more{margin-top:400px;}
.fxImg{position:absolute;left:0;top:0;background:#fff;display:none;cursor:pointer;padding:5px;}
</style>
<script type="text/javascript">
ldh={
$:function(o){return typeof o=="string"?document.getElementById(o):o},
$$:function (o,p){return (p==undefined?document:this.$(p)).getElementsByTagName(o)},
on:function(o,type,fn){o.attachEvent?o.attachEvent('on'+type,function(){fn.call(o)}):o.addEventListener(type,fn,false);return this},
css:function(who,key){
if(who.style[key]!='')return who.style[key];
if(!!window.ActiveXObject)return who.currentStyle[key];
return document.defaultView.getComputedStyle(who,"")
.getPropertyValue(key.replace(/([A-Z])/g,"-$1").toLowerCase());
},
pos:function(who){
var p=ldh.$(who),x=0,y=0;
while(p&&!(/html|body/i.test(p.tagName))){x+=p.offsetLeft;y+=p.offsetTop;p=p.offsetParent;};
return {'x':x,'y':y};
},
move:function(who,attr,val,s,fn){
who=this.$(who);
var isbg=/backgroundPosition/i.test(attr)
,fm=parseInt(this.css(who,attr))||0
,by=isbg?((who.getAttribute('bg_y')||0)+'px'):'';
if(this.css(who,attr)==undefined&&isbg)fm=200;
var iFx=this.fx(fm,val,s);
clearInterval(who['timer_'+attr]);
who['timer_'+attr]=setInterval(function (){
var v=iFx();
who.style[attr]=v+'px '+by;
if(v==val){ fn&&fn();clearInterval(who['timer_'+attr]);};
},18);return this;
},
fx:function(form,to,s){
var m=Math[form<to?'ceil':'floor'];
return function (){return form+=m((to-form)*(s||0.4))};
}
};
ldh.on(window,'load',function (){
var fxImg=document.createElement('IMG');
fxImg.className='fxImg';
document.body.appendChild(fxImg);
var pos=ldh.pos('preview');
var links=ldh.$$('A',ldh.$('menuPic'));
for (var i=0;i<links.length;++i ) {
var $=links[i],$p=ldh.$$('IMG',$)[0],mypos=ldh.pos($p),url=$.href
,attr={href:'javascript:void(0);',imgsrc:$p.src,x:mypos.x,y:mypos.y,'url':url};
for (var Id in attr){$[Id]=attr[Id]}
ldh.on($,'click',function (){
fxImg.src=this.imgsrc;
var $$=fxImg.style,This=this;
$$.left=this.x+'px';
$$.top=this.y+'px';
$$.display='block';
$$.height='140px';
fxImg.onclick=function (){location=This.url};
ldh.move(fxImg,'left',pos.x).move(fxImg,'top',pos.y,0.4,function(){ldh.move(fxImg,'height',400)});
});
}
})
</script>
</head>
<body>
<div class="main">
<div class="left" id="menuPic">
<ul>
<li><a href="http://www.webdm.cn" ><img src="http://www.webdm.cn/images/wall1_s.jpg" /></a></li>
<li><a href="http://www.webdm.cn"><img src="http://www.webdm.cn/images/wall2_s.jpg" /></a></li>
<li><a href="http://www.webdm.cn"><img src="http://www.webdm.cn/images/wall3_s.jpg" /></a></li>
</ul>
</div>
</div>
</body>
</html>
<br />
<p><a href="http://www.webdm.cn">网页代码站</a> - 最专业的网页代码下载网站 - 致力为中国站长提供有质量的网页代码！</p>
代码来自：http://www.webdm.cn/webcode/8f9b3ef7-bca1-42ef-b0af-ac43e83e9fc6.html