var t = n = 0, count;
$(document).ready(function(){
count=$("#banner_list a").length; 
$("#banner_list a:not(:first-child)").hide();
$("#banner_info").html($("#banner_list a:first-child").find("img").attr('alt'));
$("#banner_info").click(function(){window.open($("#banner_list a:first-child").attr('href'), "_blank")});
$("#banner li").click(function() {
var i = $(this).text() - 1;//获取Li元素内的值，即1，2，3，4   
n = i;
if (i >= count) return;
$("#banner_info").html($("#banner_list a").eq(i).find("img").attr('alt')); 
$("#banner_info").unbind().click(function(){window.open($("#banner_list a").eq(i).attr('href'), "_blank")})
$("#banner_list a").filter(":visible").fadeOut(500).parent().children().eq(i).fadeIn(1000); 
$(this).css({"background":"#be2424",'color':'#000'}).siblings().css({"background":"#6f4f67",'color':'#fff'});
});
t = setInterval("showAuto()", 4000); 
$("#banner").hover(function(){clearInterval(t)}, function(){t = setInterval("showAuto()", 4000);});})
function showAuto(){
	n = n >=(count - 1) ? 0 : ++n; 
	$("#banner li").eq(n).trigger('click');
}