$(function(){
   var imgNode = $("#items").find("img");
   $(imgNode).each(function(){
       $(this).css({
                       position:"absolute",
                       left:0,
                       top:0
                   });       
   });
    $(imgNode).eq(0).css({"z-index":1});
var t = null;
var index = 0;

t = setInterval(function(){
index = parseInt(index + 1) === $(imgNode).length ? 0 : parseInt(index + 1);
change(index,imgNode);

},5000);


   function change(index,changeObj){
           $(changeObj).eq(index).siblings().css("z-index","0").fadeOut("slow");
           $(changeObj).eq(index).css("z-index","1").fadeIn("slow");
  };

    var tabs = $("#tab_cards").find("li");
    $(tabs).each(function(index){
        $(this).mouseover(function(){
            $(this).removeClass("tab_on")
                .addClass("tab_on")
                .siblings()
                .removeClass("tab_on");
            $("#tab_con").find("ul").eq(index)
                .show()
                .siblings()
                .hide();
             $("#tab_more").attr("href",$(this).attr("rel"));
        });
    });

    var dateTarget = $("#cur_date");
    var tUpdate = null;
    updateTime(dateTarget);

    tUpdate = setInterval(function(){
        updateTime(dateTarget);
    },1000);

    function updateTime(obj){
        var weekDay = ["日","一","二","三","四","五","六"];
        var curDate = new Date();
        $(obj).text("日期：" + curDate.getFullYear() + "-"
            + toDouble(parseInt(curDate.getMonth() + 1) + "-"
            + toDouble(curDate.getDate())) + "  星期"
            + weekDay[curDate.getDay()] + "  "
            + toDouble(curDate.getHours()) + ":"
            + toDouble(curDate.getMinutes()) + ":"
            + toDouble(curDate.getSeconds()));
    }

    function toDouble(obj){
        if(obj < 10){
            return "0" + obj;
        }else{
            return obj;
        }
    }
});