// JavaScript Document
(function($){
$.fn.extend({
    scro:function(){
       		var self=$(this);var sl;var i=0;var woniao=false;var timerID;var jsq=0;
			var len=self.find("ul").size()*self.find("ul").height();
			self.height(len);
			if(self.find("ul").size()<=1){return;} 
			var leWidth=self.find("ul").height();
			var so1_le=function(){
				woniao=true;
				jsq-=1;
				//$("#down").attr("src","images/trackbar/down.jpg");
				$("#down").show();
				$("#hide_down").hide();
				//if(jsq == 0){$("#up").attr("src","images/trackbar/updown_bg.jpg");$("#down").show();}
				if(jsq == 0){$("#up").hide(); $("#hide_up").show();$("#down").show();}
				$("#up").unbind("click",so1_le);
				sl=self.find("ul:last");
				self.find("ul:first").before(sl);
				self.css({marginTop: -leWidth +"px"});
				self.animate({"marginTop": 0},"fast",function(){
					$("#up").bind("click",so1_le);
				});
			}
			var so1_ri=function(){
				woniao=false;
				jsq+=1;
				//$("#up").attr("src","images/trackbar/up.jpg");
				$("#up").show();
				$("#hide_up").hide();
				//if(jsq == self.find("ul").size()-1){$("#down").attr("src","images/trackbar/updown_bg.jpg");$("#up").show();}
				if(jsq == self.find("ul").size()-1){$("#down").hide(); $("#hide_down").show(); $("#up").show();}
				$("#down").unbind("click",so1_ri);
					sl=self.find("ul:first");
					self.animate({"marginTop": -leWidth+"px"},"fast",function(){
						self.append(sl);										   
						self.css({"marginTop": 0});												   
						$("#down").bind("click",so1_ri); 
					})
			}

			var left=function(){so1_le()}
			var right=function(){so1_ri()}
			$("#up").click(so1_le);
			$("#down").click(so1_ri);
		}
	})
})(jQuery);
$(document).ready(function(){
	$("#srlc").scro();	
})