博客园美化小火箭

一.代码

  <!-- 小火箭-->
<script src="https://blog-static.cnblogs.com/files/pythonywy/jquery1.7.js"></script>
<style type="text/css">

    /*回到顶部*/
    #rocket-to-top div {
        left: 0;
        margin: 0;
        overflow: hidden;
        padding: 0;
        position: absolute;
        top: 0;
        width: 149px;
    }

    #rocket-to-top .level-2 {
        background: url("https://images.cnblogs.com/cnblogs_com/pythonywy/1455951/o_redhuojian2.png") no-repeat scroll -149px 0 transparent;
        display: none;
        height: 250px;
        opacity: 0;
        z-index: 1;
    }

    #rocket-to-top .level-3 {
        background: none repeat scroll 0 0 transparent;
        display: block;
        height: 150px;
        z-index: 2;
    }

    #rocket-to-top .level-3:hover {
        cursor: url(https://images.cnblogs.com/cnblogs_com/pythonywy/1516412/o_huo3.png), auto;
    }

    #rocket-to-top .level-3:active {
        cursor: url(https://images.cnblogs.com/cnblogs_com/pythonywy/1516412/o_huo1.png), auto;
    }

    #rocket-to-top .level-3:focus {
        cursor: url(https://images.cnblogs.com/cnblogs_com/pythonywy/1516412/o_huo2.png), auto;
    }

    #rocket-to-top {
        background: url("https://images.cnblogs.com/cnblogs_com/pythonywy/1455951/o_redhuojian2.png") no-repeat scroll 0 0 transparent;
        cursor: default;
        display: block;
        height: 250px;
        margin: -125px 0 0;
        overflow: hidden;
        padding: 0;
        position: fixed;
        left: -40px;
        top: 90%;
        width: 149px;
        z-index: 11;
    }
</style>
<div style="display: none;" id="rocket-to-top">
    <div style="opacity:0;display: block;" class="level-2"></div>
    <div class="level-3"></div>
</div>
<script>
    $(function () {
        var e = $("#rocket-to-top"),
            t = $(document).scrolltop(),
            n,
            r,
            i = !0;
        $(window).scroll(function () {
            var t = $(document).scrolltop();
            t == 0 ? e.css("background-position") == "0px 0px" ? e.fadeout("slow") : i && (i = !1, $(".level-2").css("opacity", 1), e.delay(100).animate({
                    margintop: "-1000px"
                },
                "normal",
                function () {
                    e.css({
                        "margin-top": "-125px",
                        display: "none"
                    }),
                        i = !0
                })) : e.fadein("slow")
        }),
            e.hover(function () {
                    $(".level-2").stop(!0).animate({
                        opacity: 1
                    })
                },
                function () {
                    $(".level-2").stop(!0).animate({
                        opacity: 0
                    })
                }),
            $(".level-3").click(function () {
                function t() {
                    var t = e.css("background-position");
                    if (e.css("display") == "none" || i == 0) {
                        clearinterval(n),
                            e.css("background-position", "0px 0px");
                        e.css("cursor", "url(https://images.cnblogs.com/cnblogs_com/pythonywy/1516412/o_huo1.png), auto");
                        return
                    }
                    switch (t) {
                        case "0px 0px":
                            e.css("background-position", "-298px 0px");
                            break;
                        case "-298px 0px":
                            e.css("background-position", "-447px 0px");
                            break;
                        case "-447px 0px":
                            e.css("background-position", "-596px 0px");
                            break;
                        case "-596px 0px":
                            e.css("background-position", "-745px 0px");
                            break;
                        case "-745px 0px":
                            e.css("background-position", "-298px 0px");
                    }
                }

                if (!i) return;
                n = setinterval(t, 50),
                    $("html,body").animate({scrolltop: 0}, "slow");
            });
    });
</script>

二.原理

移动背景图片位置,也就是精灵图来实现的

可能会出现的异常,文件的范跨越问题,你把我文件中的jq,以及图片复制到你的博客文件或者相册中一一对应导入

制作精灵图需要一定的ps基础

三.效果展示