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主题：Javascript设计漫天雪花
发信人: 2001asp(ujj)
整理人: eagle(2001-05-19 17:44:24), 站内信件
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()"> 




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