将代码复制到记事本，保持关闭，将后缀名改成HTML，双击打开

html, body

{

width: 100%;

height: 100%;

margin: 0;

padding: 0;

border: 0;

}

div

{

margin: 0;

padding: 0;

border: 0;

}

.nav

{

position: absolute;

top: 0;

left: 0;

width: 100%;

height: 27px;

background-color: white;

color: black;

text-align: center;

line-height: 25px;

}

a

{

color: black;

text-decoration: none;

border-bottom: 1px dashed black;

}

a:hove

{

border-bottom: 1px solid red;

}

.previous

{

float: left;

margin-left: 10px;

}

.next

{

float: right;

margin-right: 10px;

}

.green

{

color: green;

}

.red

{

color: red;

}

textarea

{

width: 100%;

height: 100%;

border: 0;

padding: 0;

margin: 0;

padding-bottom: 20px;

}

.block-outer

{

float: left;

width: 22%;

height: 100%;

padding: 5px;

border-left: 1px solid black;

margin: 30px 3px 3px 3px;

}

.block-inner

{

height: 68%;

}

.one

{

border: 0;

}

var collapsed = true;

function toggle()

{

var fs = top.document.getElementsByTagName('frameset')[0];

var f = fs.getElementsByTagName('frame');

if (collapsed)

{

fs.rows = '250px,*';

fs.noResize = false;

f[0].noResize = false;

f[1].noResize = false;

}

else

{

fs.rows = '30px,*';

fs.noResize = true;

f[0].noResize = true;

f[1].noResize = true;

}

collapsed = !collapsed;

}

var b = document.body;

var c = document.getElementsByTagName('canvas')[0];

var a = c.getContext('2d');

document.body.clientWidth;

M=Math;

Q=M.random;J=[];

U=16;

T=M.sin;

E=M.sqrt;

for(O=k=0;x=z=j=i=k10|!k)

for(

font='60px Impact',

V='rgba(';I=i*U,fillStyle=k?k==13?V+'205,205,215,.15)':

V+(147+I)+','+(k%2?128+I:0)+','+I+',.5)':'#cca',i>1,

i++0)+',40,.1)'),

moveTo(U+x*8,U+y*8),

lineTo(U+x*U,U+y*U),

stroke();

for(

y=H=k+E(k++)*25,

R=Q()*W;

P=3,jH&Q()>.8?Q(P=9)*4:0)>>1]

}

setInterval(function G(m,l)

{

A=T(D-11);

if(l)

return(

m[2]-l[2])*A+(l[0]-m[0])*T(D);

a.clearRect(0,0,W,W);

J.sort(G);

for(

i=0;

L=J[i++];

a.drawImage(M[L[3]+1],207+L[0]*A+L[2]*T(D)>>0,L[1]>>1))

{

if(i==2e3)

a.fillText

('Happy Christmas!',U,345);

if(!(i%7))

a.drawImage(M[13],

((157*(i*i)+T(D*5+i*i)*5)%W)>>0,

((113*i+(D*i)/60)%(290+i/99))>>0);

}

D+=.02

},1)