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() {
$(this).remove()
}
);
}, options.newOn);
};
})(jQuery);
园子里的朋友只要把下面代码添加到（管理-》设置-》页脚HTML代码）中就可以了，非简单！
温馨提示：因为会被转义，这里给雪花编码加个空格，使用的时候记得把html(‘& #10052;’) 的& #间空格去掉啊。
<script>
(function($){$.fn.snow=function(options){var $flake=$(‘<div id=”flake” />’).css({‘position’:’absolute’,’top’:’-50px’}).html(‘& #10052;’),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>
