拷进去就好了，或者调用！！！！
<script language="JavaScript">
<!--
N =20
Y = new Array()
X = new Array()
S = new Array()
A = new Array()
B = new Array()
M = new Array()
V = (document.layers)?1:0
iH=(document.layers)?window.innerHeight:window.document.body.clientHeight
iW=(document.layers)?window.innerWidth:window.document.body.clientWidth
for (i=0i <Ni++){
Y[i]=Math.round(Math.random()*iH)
X[i]=Math.round(Math.random()*iW)
S[i]=Math.round(Math.random()*5+2)
A[i]=0
B[i]=Math.random()*0.1+0.1
M[i]=Math.round(Math.random()*1+7)
}
if (V){
for (i = 0i <Ni++)
{document.write("<LAYER NAME='sn"+i+"' LEFT=0 TOP=0 BGCOLOR='#FFFFF0' CLIP='0,0,"+M[i]+","+M[i]+"'z-index: 1><font color=white size=3 face='Wingdings'>T</font></LAYER>")}
}
else{
document.write('<div style="position:absolutetop:0pxleft:0pxz-index: 1">')
document.write('<div style="position:relativez-index: 1">')
for (i = 0i <Ni++)
{document.write('<div id="si" style="position:absolutez-index: 1top:0left:0width:'+M[i]+'height:'+M[i]+'font-size:'+M[i]+'"><font color=white size=3 face="Wingdings">T</font></div>')}
document.write('</div></div>')
}
function snow(){
var H=(document.layers)?window.innerHeight:window.document.body.clientHeight
var W=(document.layers)?window.innerWidth:window.document.body.clientWidth
var T=(document.layers)?window.pageYOffset:document.body.scrollTop
var L=(document.layers)?window.pageXOffset:document.body.scrollLeft
for (i=0i <Ni++){
sy=S[i]
sx=S[i]*Math.cos(A[i])
Y[i]+=sy
X[i]+=sx
if (Y[i] >H){
Y[i]=-10
X[i]=Math.round(Math.random()*W)
M[i]=Math.round(Math.random()*1+7)
S[i]=Math.round(Math.random()*5+2)
}
if (V){document.layers['sn'+i].left=X[i]document.layers['sn'+i].top=Y[i]+T}
else{si[i].style.pixelLeft=X[i]si[i].style.pixelTop=Y[i]+T}
A[i]+=B[i]
}
setTimeout('snow()',40)
}
snow()
//-->
</script>
把下列代码加到网页的<Body></Body>标签之间<html>
<head>
<title>:::飘雪花效果:::网页特效代码:::失落网家园http://livehe.51.net/</title>
</head>
<BODY bgcolor="#000000">
<SCRIPT language=JavaScript1.2>
var snowsrc="img/snow.gif"
var no = 10
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 = 800, doc_height =600
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()
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\"><a href=\"http://livehe.51.net//\"><img src='"+snowsrc+"' border=\"0\"></a></layer>")
} else {
document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src='"+snowsrc+"' border=\"0\"></layer>")
}
} else if (ie4up) {
if (i == 0) {
document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absoluteZ-INDEX: "+ i +"VISIBILITY: visibleTOP: 15pxLEFT: 15px\"><a href=\"http://livehe.51.net/\"><img src='"+snowsrc+"' border=\"0\"></a></div>")
} else {
document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absoluteZ-INDEX: "+ i +"VISIBILITY: visibleTOP: 15pxLEFT: 15px\"><img src='"+snowsrc+"' border=\"0\"></div>")
}
}
}
function snowNS() { // 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("snowNS()", 10)
}
function snowIE() { // 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("snowIE()", 10)
}
if (ns4up) {
snowNS()
} else if (ie4up) {
snowIE()
}
</SCRIPT>
<table border="0" width="100%" cellpadding="0">
<tr>
<td width="100%"><font color="#ffffff" size="2"><b>飘雪花效果</b>注意保存这个图片（<img border="1" src="img/snow.gif" width="16" height="17">）</font></td>
</tr>
<tr>
<td width="100%">
</table>
<script language="JavaScript" type="text/javascript" src="js.js"></script><tr></body>
</html>
