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':'#000000'}).siblings().css({"background":"#6f4f67",'color':'#ffffff'});        
    });        
    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');    }