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body{   
    background:url(图片链接);
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<!--浏览器搞笑标题-->
  var OriginTitle = document.title;
  var titleTime;
  document.addEventListener('visibilitychange', function () {
    if (document.hidden) {
      $('[rel="icon"]').attr('href', "/img/failure.ico");
        document.title = 'ヽ(●-`Д´-)ノ你丑你就走！';
        clearTimeout(titleTime);
      }
    else {
      $('[rel="icon"]').attr('href', "/img/favicon.png");
      document.title = '(/≧▽≦/)咦！又好了 ' + OriginTitle;
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<script type="text/javascript" src="\js\FunnyTitle.js"></script>

function show_date_time(){
    window.setTimeout("show_date_time()", 1000);
    BirthDay=new Date("09/13/2020 0:0:0");//修改为自己的blog建站时间
    today=new Date();
    timeold=(today.getTime()-BirthDay.getTime());
    sectimeold=timeold/1000
    secondsold=Math.floor(sectimeold);
    msPerDay=24*60*60*1000
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    hrsold=setzero(Math.floor(e_hrsold));
    e_minsold=(e_hrsold-hrsold)*60;
    minsold=setzero(Math.floor((e_hrsold-hrsold)*60));
    seconds=setzero(Math.floor((e_minsold-minsold)*60));
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    if (i<10)
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    return i;
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