将下面的代码复制到你的设置栏下页眉html代码框中即可

< script >

(function($) {

    $.fn.snow = function(options) {

        var $flake = $('<div id="flake" />').css({

            'position': 'absolute',

            'top': '-50px'

        }).html('❄'),

        documentHeight = $(document).height(),

        documentWidth = $(document).width(),

        defaults = {

            minSize: 10,

            maxSize: 20,

            newOn: 500,

            flakeColor: "#FFFFFF"

        },

        options = $.extend({},

        defaults, options);

        var interval = setInterval(function() {

            var startPositionLeft = Math.random() * documentWidth - 100,

            startOpacity = 0.5 + Math.random(),

            sizeFlake = options.minSize + Math.random() * options.maxSize,

            endPositionTop = documentHeight - 40,

            endPositionLeft = startPositionLeft - 100 + Math.random() * 200,

            durationFall = documentHeight * 10 + Math.random() * 5000;

            $flake.clone().appendTo('body').css({

                left: startPositionLeft,

                opacity: startOpacity,

                'font-size': sizeFlake,

                color: options.flakeColor

            }).animate({

                top: endPositionTop,

                left: endPositionLeft,

                opacity: 0.2

            },

            durationFall, 'linear',

            function() {

                $(this).remove()

            });

        },

        options.newOn);

    };

})(jQuery);

$.fn.snow({

    minSize: 5,

    maxSize: 50,

    newOn: 1000,

    flakeColor: '#FFF'

});

< /script>