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新年网页漂浮雪花代码

QQ截图20200207225256.jpg

<script type="text/javascript" language="javascript">(function() {    function k(a, b, c) {        if (a.addEventListener) a.addEventListener(b, c, false);        else a.attachEvent && a.attachEvent("on" + b, c)    }    function g(a) {        if (typeof window.onload != "function") window.onload = a;        else {            var b = window.onload;            window.onload = function() {                b();                a()            }        }    }    function h() {        var a = {};        for (type in {            Top: "",            Left: ""        }) {            var b = type == "Top" ? "Y": "X";            if (typeof window["page" + b + "Offset"] != "undefined") a[type.toLowerCase()] = window["page" + b + "Offset"];            else {b = document.documentElement.clientHeight ? document.documentElement: document.body;                a[type.toLowerCase()] = b["scroll" + type]            }        }        return a    }    function l() {        var a = document.body,        b;        if (window.innerHeight) b = window.innerHeight;        else if (a.parentElement.clientHeight) b = a.parentElement.clientHeight;        else if (a && a.clientHeight) b = a.clientHeight;        return b    }    function i(a) {        this.parent = document.body;        this.createEl(this.parent, a);        this.size = Math.random() * 11 + 11;        this.el.style.width = Math.round(this.size) + "px";        this.el.style.height = Math.round(this.size) + "px";        this.maxLeft = document.body.offsetWidth - this.size;        this.maxTop = document.body.offsetHeight - this.size;        this.left = Math.random() * this.maxLeft;        this.top = h().top + 1;        this.angle = 1.4 + 0.2 * Math.random();        this.minAngle = 1.4;        this.maxAngle = 1.6;        this.angleDelta = 0.01 * Math.random();        this.speed = 2 + Math.random()    }    var j = false;    g(function() {        j = true    });    var f = true;    window.createSnow = function(a, b) {        if (j) {            var c = [],            m = setInterval(function() {                f && b > c.length && Math.random() < b * 0.0025 && c.push(new i(a)); ! f && !c.length && clearInterval(m);                for (var e = h().top, n = l(), d = c.length - 1; d >= 0; d--) if (c[d]) if (c[d].top < e || c[d].top + c[d].size + 1 > e + n) {                    c[d].remove();                    c[d] = null;                    c.splice(d, 1)                } else {                    c[d].move();                    c[d].draw()                }            },            40);            k(window, "scroll",            function() {                for (var e = c.length - 1; e >= 0; e--) c[e].draw()            })        } else g(function() {            createSnow(a, b)        })    };    window.removeSnow = function() {        f = false    };    i.prototype = {        createEl: function(a, b) {            this.el = document.createElement("img");            this.el.setAttribute("src", b + "https:///xuehua.gif");            this.el.style.position = "absolute";            this.el.style.display = "block";            this.el.style.zIndex = "99999";            this.parent.appendChild(this.el)        },        move: function() {            if (this.angle < this.minAngle || this.angle > this.maxAngle) this.angleDelta = -this.angleDelta;            this.angle += this.angleDelta;            this.left += this.speed * Math.cos(this.angle * Math.PI);            this.top -= this.speed * Math.sin(this.angle * Math.PI);            if (this.left < 0) this.left = this.maxLeft;            else if (this.left > this.maxLeft) this.left = 0        },        draw: function() {            this.el.style.top = Math.round(this.top) + "px";            this.el.style.left = Math.round(this.left) + "px"        },        remove: function() {            this.parent.removeChild(this.el);            this.parent = this.el = null        }    }})();createSnow("", 40);</script>