function scrollNews(selector,Entry,time,StartIndex)
{
	var _self=this;
	this.Selector=selector;
	this.Entry=Entry;
	this.time = time;
	this.i=StartIndex||0;
	this.Count=$(this.Selector+" ul li").length;
	$(this.Selector+" ul li").hide();//全部隱藏
	$(this.Selector+" ul li").eq(this.i).show();//第i個顯示
	$(this.Selector).bind("mouseenter",function(){
	    	if(_self.sI){clearInterval(_self.sI);}
	}).bind("mouseleave",function(){
			_self.showIndex(_self.i++);
	})
	this.sI=setInterval(this.Entry+".showIndex(null)",this.time);
	
	this.GetSelector=function(){return this.Selector;}
	this.showIndex=function(index)
	{
		this.i++;//顯示下一個
		if(this.sI){clearInterval(this.sI);}
		this.sI=setInterval(this.Entry+".showIndex()",this.time);
		if (index!=null)
		{
			this.i=index;
		}
		if(this.i==this.Count)
			this.i=0;
		$(this.Selector+" ul li").hide();
		$(this.Selector+" ul li").eq(this.i).slideDown();
	}
}
/**滾動新聞展示效果
code by CssRain--橘子.
轉載請注明:http://www.cssrain.cn
// 參數1：ID    		
// 參數2：實例化對象的名稱（跟var 后的相同）
// 參數3：間隔時間      
// 參數4：初始化時，默認哪個先顯示
**/
var s=new scrollNews("#trends","s", 3000 , 3);