花瓣变叉叉是因为下面语句中的图片地址失效或者你的电脑没有连接上网络
STAR[0] = "http://blog.com.cn/skin/lixia/236605054.gif"
.....
<SCRIPT language=JavaScript1.2>
<!-- Begin
//<!-- Original: Altan (snow@altan.hr) -->
//<!-- Web Site: http://www.altan.hr/snow -->
// Script arranged by Hisa (http://www.suisen.sakura.ne.jp/~ikitai/js/)
var no = 13// STAR number?@?P¡ë?¨C¨º?¨¦?o?¨¦¡ë?¡®??¨¬¨C??¡±
var speed = 10// smaller number moves the STAR faster
STAR = new Array()
STAR[0] = "http://blog.com.cn/skin/lixia/236605054.gif"
STAR[1] = "http://blog.com.cn/skin/lixia/236596767.gif"
STAR[2] = "http://blog.com.cn/skin/lixia/236597338.gif"
STAR[3] = "http://blog.com.cn/skin/lixia/236598420.gif"
STAR[4] = "http://blog.com.cn/skin/lixia/236599138.gif"
STAR[5] = "http://blog.com.cn/skin/lixia/236600240.gif"
var ns4up = (document.layers) ? 1 : 0 // browser sniffer
var ie4up = (document.all) ? 1 : 0
var dx, xp, yp // coordinate and position variables
var am, stx, sty // amplitude and step variables
var i, doc_width = 1500, doc_height = 1800
if (ns4up) {
doc_width = self.innerWidth
doc_height = self.innerHeight
} else if (ie4up) {
doc_width = document.body.clientWidth
doc_height = document.body.clientHeight
}
dx = new Array()
xp = new Array()
yp = new Array()
am = new Array()
stx = new Array()
sty = new Array()
j = 0
for (i = 0i <no++ i) {
dx[i] = 0 // set coordinate variables
xp[i] = Math.random()*(doc_width-50) // set position variables
yp[i] = Math.random()*doc_height
am[i] = Math.random()*20// set amplitude variables
stx[i] = 0.02 + Math.random()/10// set step variables
sty[i] = 0.7 + Math.random()// set step variables
if (ns4up) { // set layers
if (i == 0) {
document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src=\"" + STAR[j] + "\" border=\"0\"></layer>")
} else {
document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src=\"" + STAR[j] + "\" border=\"0\"></layer>")
}
} else if (ie4up) {
if (i == 0) {
document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absoluteZ-INDEX: "+ i +" VISIBILITY: visibleTOP: 15pxLEFT: 15pxwidth:1\"><img src=\"" + STAR[j] + "\" border=\"0\"></div>")
} else {
document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absoluteZ-INDEX: "+ i +" VISIBILITY: visibleTOP: 15pxLEFT: 15pxwidth:1\"><img src=\"" + STAR[j] + "\" border=\"0\"></div>")
}
}
if (j == (STAR.length-1)) { j = 0} else { j += 1}
}
function STAR_NS() { // Netscape main animation function
for (i = 0i <no++ i) { // iterate for every dot
yp[i] += sty[i]
if (yp[i] >doc_height-50) {
xp[i] = Math.random()*(doc_width-am[i]-30)
yp[i] = 0
stx[i] = 0.02 + Math.random()/10
sty[i] = 0.7 + Math.random()
doc_width = self.innerWidth
doc_height = self.innerHeight
}
dx[i] += stx[i]
document.layers["dot"+i].top = yp[i]
document.layers["dot"+i].left = xp[i] + am[i]*Math.sin(dx[i])
}
setTimeout("STAR_NS()", speed)
}
function STAR_IE() { // IE main animation function
for (i = 0i <no++ i) { // iterate for every dot
yp[i] += sty[i]
if (yp[i] >doc_height-50) {
xp[i] = Math.random()*(doc_width-am[i]-30)
yp[i] = 0
stx[i] = 0.02 + Math.random()/10
sty[i] = 0.7 + Math.random()
doc_width = document.body.clientWidth
doc_height = document.body.clientHeight
}
dx[i] += stx[i]
document.all["dot"+i].style.pixelTop = yp[i]
document.all["dot"+i].style.pixelLeft = xp[i] + am[i]*Math.sin(dx[i])
}
setTimeout("STAR_IE()", speed)
}
if (ns4up) {
STAR_NS()
} else if (ie4up) {
STAR_IE()
}
// End -->
</SCRIPT>
方法一：最简单的可以
新建场景
先把花瓣做成“影片剪辑”（可以旋转型，也可以大小变化型）
然后再用"运动引导层"和"补间动画"将单个花瓣的“影片剪辑”元件按照想要花瓣飘落的路径连起来
做多个不同路线的引导层相交叠，就可以了，再在最后一帧加时间轴的控制（一般为全局函数——时间轴控制的“gotoandplay"从最后一帧回到第一帧实现重复飘落）
也可以用代码写，这个，比较麻烦，只说也说不清楚，要对代码熟悉
方法二：
去网上找花瓣飘落源文件资源下载，再导入所做的FLASH中即可
地址（网上最常用的）：http://www.5uflash.com/flashyuanma/toumingflash/3509.html
可以自己稍作修改（方向，速度什么的）
