【 tulaoshi.com - Javascript 】
                             
                               原代码插入到<body下面:<script language="JavaScript" 
<!-- 
N = 40; 
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=0; i < N; i++){ 
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+1); 
} 
if (V){ 
for (i = 0; i < N; i++) 
{document.write("<LAYER NAME='sn"+i+"' LEFT=0 TOP=0 BGCOLOR='#FFFFF0' CLIP='0,0,"+M[i]+","+M[i]+"'</LAYER")} 
} 
else{ 
document.write('<div style="position:absolute;top:0px;left:0px"'); 
document.write('<div style="position:relative"'); 
for (i = 0; i < N; i++) 
{document.write('<div id="si" style="position:absolute;top:0;left:0;width:'+M[i]+';height:'+M[i]+';background:#fffff0;font-size:'+M[i]+'"</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=0; i < N; i++){ 
sy=S[i]*Math.sin(90*Math.PI/180); 
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+1); 
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()',10); 
} 
//-- 
</script 
把<body中的内容改为: 
<body bgcolor=#ffffff onLoad="snow()"