jquery 幻灯片 图片切换效果

(function($){
$.fn.extend({
Tabs:function(options){
// 处理参数
options = $.extend({
event : 'mouseover',	//事件类型
timeout : 0,			//设置事件延迟
auto : 0,				//多少秒自动切换一次
callback : null			//回调函数
}, options);

var self = $(this),
tabBox = self.children( 'div.tab_box' ).children( 'div' ),
menu = self.find( 'ul.tab_menu' ),
items = menu.find( 'li' ),
timer;

var tabHandle = function( elem ){
elem.siblings( 'li' )
.removeClass( 'current' )
.end()
.addClass( 'current' );

tabBox.siblings( 'div' )
.addClass( 'hide' )
.end()
.eq( elem.index() )
.removeClass( 'hide' );
},

delay = function( elem, time ){
time ? setTimeout(function(){ tabHandle( elem ); }, time) : tabHandle( elem );
},

start = function(){
if( !options.auto ) return;
timer = setInterval( autoRun, options.auto );
},

autoRun = function(){
var current = menu.find( 'li.current' ),
firstItem = items.eq(0),
len = items.length,
index = current.index() + 1,
item = index === len ? firstItem : current.next( 'li' ),
i = index === len ? 0 : index;

current.removeClass( 'current' );
item.addClass( 'current' );

tabBox.siblings( 'div' )
.addClass( 'hide' )
.end()
.eq(i)
.removeClass( 'hide' );
};

items.bind( options.event, function(){
delay( $(this), options.timeout );
if( options.callback ){
options.callback( self );
}
});

if( options.auto ){
start();
self.hover(function(){
clearInterval( timer );
timer = undefined;
},function(){
start();
});
}

return this;
}
});
})(jQuery);

$(function() {
$("#imgsider").Tabs({auto : 3000, event : 'click'}); //顶部 图片预览
}）

<style>
.backgroundImgWrap{width:100%;height:100%;position:absolute;top:0;left:0;overflow:hidden;}
.bgafill{width:100%;height:100%;}
a{text-decoration:none;}
a:hover{text-decoration:underline;}
.newbox{width:525px;height:286px;padding:11px;background:url(images/news_pic_bg.gif) no-repeat;overflow:hidden;position:relative;}
.new_content{width:100%;}
.hide{display:none;}
.new_list{height:8px;position:absolute;right:22px;bottom:21px;}
.new_list li{list-style-type:none;width:9px;height:8px;margin-left:6px;background:url(images/gray_icon.gif) no-repeat;cursor:pointer;float:left;}
.new_list li.current{list-style-type:none;background:url(images/red_icon2.gif) no-repeat;}
.newData img{width:523px;height:284px;}
.ptitle{width:509px;height:64px;padding-left:14px;overflow:hidden;background:url(images/bs_bg.png);position:absolute;bottom:13px;left:11px;}
.ptitle a{font:18px/48px Microsoft yahei;color:#000;text-decoration:none;}

</style>

<div id="imgsider" class="newbox fL">
<div class="new_content tab_box">
<div class="newData">
<p><img src="images/pic.jpg" /></p>
<span class="ptitle"><a href="#">上海地铁与艺术人文频道签署战略协议</a></span>
</div>
<div class="newData hide">
<p><img src="images/pic01.jpg" /></p>
<span class="ptitle"><a href="#">上海地铁与艺术人文频道签署战略协议3</a></span>
</div>
<div class="newData hide">
<p><img src="images/pic02.jpg" /></p>
<span class="ptitle"><a href="#">上海地铁与艺术人文频道签署战略协议1</a></span>
</div>
<div class="newData hide">
<p><img src="images/pic03.jpg" /></p>
<span class="ptitle"><a href="#">上海地铁与艺术人文频道签署战略协议2</a></span>
</div>
<div class="newData hide">
<p><img src="images/pic04.jpg" /></p>
<span class="ptitle"><a href="#">上海地铁与艺术人文频道签署战略协议3</a></span>
</div>
<div class="newData hide">
<p><img src="images/pic05.jpg" /></p>
<span class="ptitle"><a href="#">上海地铁与艺术人文频道签署战略协议2</a></span>
</div>
</div>
<ul class="new_list tab_menu">
<li class="current"> </li>
<li> </li>
<li> </li>
<li> </li>
<li> </li>
<li> </li>
</ul>
</div>