CSS代码：

javascript代码 ：

//进度条加载显示
$(<a target="_blank" href="https://www.kaiyuanyuanma.com/tag/701.html" title="View all posts in window">window</a>).scroll(function(){
    var a = $(window).scrollTop(),增补
    c = $(document).height(),
    b = $(window).height();
    scrollPercent = a / (c - b)*100;
    scrollPercent = scrollPercent.toFixed(1);
    $("#percentageCounter").css({
        width: scrollPercent + "%"
});
}).trigger("scroll");
//进度条加载显示$(window).scroll(function() {    var a = $(window).scrollTop(),    c = $(document).height(),    b = $(window).height();    scrollPercent = a / (c - b) * 100;    scrollPercent = scrollPercent.toFixed(1);    $("#percentageCounter").css({        width: scrollPercent + "%"    });}).trigger("scroll");
//进度条加载显示$(window).scroll(function() {    var a = $(window).scrollTop(),    c = $(document).height(),    b = $(window).height();    scrollPercent = a / (c - b) * 100;    scrollPercent = scrollPercent.toFixed(1);    $("#percentageCounter").css({        width: scrollPercent + "%"    });}).trigger("scroll");

在主题目录header.php中，增补以下代码，彩色放在body标签下（最后一行）