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faults = { minSize : 10, maxSize : 20, newOn : 1000, flakeColor : "#FFFFFF" /* 此处可以定义雪花颜色,若要白色可以改为#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 - 200, endPositionLeft = startPositionLeft - 500 + Math.random() * 500, 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); $(function(){ $.fn.snow({ minSize: 5, /* 定义雪花最小尺寸 */ maxSize: 80,/* 定义雪花最大尺寸 */ newOn: 200 /* 定义密集程度,数字越小越密集 */ }); });