전단 꽃잎 낙하 특수효과 코드

<div style="height:100%; 
width:100%;display: none;">
         div>
<script src="js/snowfall.jquery.js">
script>

(function(){
     
var lastTime=0;
var vendors=['webkit','moz'];
for(var x=0;
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(function($){
     $.snowfall=function(element,options)
{
     var defaults=
{
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flakeColor:'#ffffff',
flakePosition:'absolute',
flakeIndex:999999,
minSize:1,maxSize:2,minSpeed:1,
maxSpeed:5,round:false,
shadow:false,collection:false,
collectionHeight:40,
deviceorientation:false},
options=$.extend(defaults,options),
random=function random(min,max){
     
return Math.round(min+Math.random()*
(max-min));
};
$(element).data("snowfall",this);
function Flake(_x,_y,_size,_speed,_id)
{
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ize=_size;this.speed=_speed;this.step=0
;this.stepSize=random(1,10)/100;if(opti
ons.collection)
{
     this.target=canvasCollection[random(0,
canvasCollection.length-1)];}
var flakeMarkup=null;
if(options.image)
{
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{
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flakeMarkup.attr({
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     this.reset();}}this.reset=function(){
     this.y=0;this.x=random(widthOffset,elWidth-widthOffset);this.stepSize=random(1,10)/100;this.size=random((options.minSize*100),(options.maxSize*100))/100;this.speed=random(options.minSpeed,options.maxSpeed);}}var flakes=[],flakeId=0,i=0,elHeight=$(element).height(),elWidth=$(element).width(),widthOffset=0,snowTimeout=0;if(options.collection!==false){
     var testElem=document.createElement('canvas');if(!!(testElem.getContext&&testElem.getContext('2d'))){
     var canvasCollection=[],elements=$(options.collection),collectionHeight=options.collectionHeight;for(var i=0;i<elements.length;i++){
     var bounds=elements[i].getBoundingClientRect(),canvas=document.createElement('canvas'),collisionData=[];if(bounds.top-collectionHeight>0){
     document.body.appendChild(canvas);canvas.style.position=options.flakePosition;canvas.height=collectionHeight;canvas.width=bounds.width;canvas.style.left=bounds.left+'px';canvas.style.top=bounds.top-collectionHeight+'px';for(var w=0;w<bounds.width;w++){
     collisionData[w]=[];}canvasCollection.push({
     element:canvas,x:bounds.left,y:bounds.top-collectionHeight,width:bounds.width,height:collectionHeight,colData:collisionData});}}}else{
     options.collection=false;}}if($(element).get(0).tagName===$(document).get(0).tagName){
     widthOffset=25;}$(window).bind("resize",function(){
     elHeight=$(element)[0].clientHeight;elWidth=$(element)[0].offsetWidth;});for(i=0;i<options.flakeCount;i+=1){
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     '-moz-border-radius':options.maxSize,'-webkit-border-radius':options.maxSize,'border-radius':options.maxSize});}if(options.shadow){
     $('.snowfall-flakes').css({
     '-moz-box-shadow':'1px 1px 1px #555','-webkit-box-shadow':'1px 1px 1px #555','box-shadow':'1px 1px 1px #555'});}var doRatio=false;if(options.deviceorientation){
     $(window).bind('deviceorientation',function(event){
     doRatio=event.originalEvent.gamma*0.1;});}function snow(){
     for(i=0;i<flakes.length;i+=1){
     flakes[i].update();}snowTimeout=requestAnimationFrame(function(){
     snow()});}snow();this.clear=function(){
     $(element).children('.snowfall-flakes').remove();flakes=[];cancelAnimationFrame(snowTimeout);}};$.fn.snowfall=function(options){
     if(typeof(options)=="object"||options==undefined){
     return this.each(function(i){
     (new $.snowfall(this,options));});}else if(typeof(options)=="string"){
     return this.each(function(i){
     var snow=$(this).data('snowfall');if(snow){
     snow.clear();}});}};})(jQuery);