2、前景文字：


< html
< head
< title bgcolor< /title
< meta http-equiv="Content-Type" content="text/html; charset=gb2312"
< script language="JavaScript"
< !--
//you can assign the initial color of the background here
r=255;
g=0;
b=0;
flag=0;
t=new Array;
o=new Array;
d=new Array;
function hex(a,c)
{
t[a]=Math.floor(c/16)
o[a]=c%16
switch (t[a])
{
case 10:
t[a]='A';
break;
case 11:
t[a]='B';
break;
case 12:
t[a]='C';
break;
case 13:
t[a]='D';
break;
case 14:
t[a]='E';
break;
case 15:
t[a]='F';
break;
default:
break;
}
switch (o[a])
{
case 10:
o[a]='A';
break;
case 11:
o[a]='B';
break;
case 12:
o[a]='C';
break;
case 13:
o[a]='D';
break;
case 14:
o[a]='E';
break;
case 15:
o[a]='F';
break;
default:
break;
}
}

function ran(a,c)
{
if ((Math.random() 2/3||c==0)&&c< 255)
{
c++
d[a]=2;
}
else
{
if ((Math.random()< =1/2||c==255)&&c 0)
{
c--
d[a]=1;
}
else d[a]=0;
}
return c
}
function do_it(a,c)
{
if ((d[a]==2&&c< 255)||c==0)
{
c++
d[a]=2
}
else
if ((d[a]==1&&c 0)||c==255)
{
c--;
d[a]=1;
}
if (a==3)
{
if (d==0&&d==0&&d==0)
flag=1
}
return c
}
function disco()
{
if (flag==0)
{
r=ran(1, r);
g=ran(2, g);
b=ran(3, b);
hex(1,r)
hex(2,g)
hex(3,b)
document.fgColor="#"+t+o+t+o+t+o
flag=50
}
else
{
r=do_it(1, r)
g=do_it(2,g)
b=do_it(3,b)
hex(1,r)
hex(2,g)
hex(3,b)
document.fgColor="#"+t+o+t+o+t+o
flag--
}
if (document.all)
setTimeout('disco()',0)
}
//--
< /script
< /head

< body onload="disco()" text="#000000" style="font:25pt 黑体" 赛迪网电脑应用
< /body
< /html