$(function(){  
	$.tabs = function(obj){  
	  return (this instanceof $.tabs) ? this.init.apply(this,arguments) : new $.tabs(obj)  
	}  
	//主动事件 通过编程触发  
	//被动事件 由用户的行为触发
	$.tabs.prototype = {  
	  init:function(obj){  
		var that = this;  
		//配置属性  

		$.extend(this,{  
		  selectedClass:"tabs_sled",  
		  tabsSelector:">dt a",  
		  panelsSelector:">dd",  
		  mouseover:$.noop,  
		  selected:0  
		}, obj || { })  

		this.ui = $(obj.selector);  
		this.tabs =  this.ui.find(this.tabsSelector);  
		this.panels = this.ui.find(this.panelsSelector);    
		this.select(this.selected)  

		this.tabs.live("mouseover",function(){
		  var index = that.tabs.index(this);  
		  that._switch.call(that,index)  
		  that.mouseover.call(this,index,that);  
		}); 
	  },  

	  _switch:function(index){  
		this.tabs.removeClass(this.selectedClass).eq(index).addClass(this.selectedClass);  
		this.panels.hide().eq(index).show();  
	  },  

	  select:function(index,callback){  
		index = ~~index;  
		this._switch(index);  
		callback && callback.call(this.tabs[index],index,this);  
	  },  

	  remove:function(index,callback){  
		index = ~~index;  
		this.tabs.eq(index).remove();   
		this.panels.eq(index).remove();  
		callback && callback.call(this.tabs[index],index,this);  
	  }  
	}  
});