\\Script para o fundo mudar de cor//

<!-- START OF SCRIPT -->
<!-- For more scripts visit http://www.netpedia.com -->
<SCRIPT LANGUAGE="javascript">
window.status = "Currently loading page, please wait and enjoy the colours.";

var hexChars = "0123456789ABCDEF";

function Dec2Hex (Dec)
{
var a = Dec % 16;
var b = (Dec - a) /16;
return (hexChars.charAt(b)+hexChars.charAt(a));
}

function Colors()
{
for (i = 1; i < 256; i++)
{
window.document.bgColor= "#FF" + Dec2Hex (i) + "00";
}
}
Colors();

//-->
</SCRIPT>

<SCRIPT LANGUAGE="javascript">

</SCRIPT>
<SCRIPT LANGUAGE="JavaScript">

<!--

window.defaultStatus = "Nice arragement huh?";

// FadeScript begin

function MakeArray(N)
{
this.length = N;
for (I = 1; I <= N; I++)
this[I] = 0;
return this;
}

Hexa = new MakeArray(16);

for (I = 0; I < 10; I++)
Hexa[I] = I;

Hexa[10]="A"; Hexa[11]="B"; Hexa[12]="C";
Hexa[13]="D"; Hexa[14]="E"; Hexa[15]="F";

function Hex(I)
{
if (I < 0)
return "FF";
else
if (I > 255)
return "00";
else
return "" + Hexa[Math.floor(I/16)] + Hexa[I%16];
}

function SetbgColor(R, G, B)
{
HexRed = Hex(R); HexGreen = Hex(G); HexBlue = Hex(B);
document.bgColor = "#" + HexRed + HexGreen + HexBlue;
}

function Fade(StartRed, StartGreen, StartBlue, EndRed, EndGreen,
EndBlue,
Step)
{
for(I = 0; I <= Step; I++)
{
Rtmp = Math.floor(StartRed * ((Step-I)/Step) + EndRed *
(I/Step));
Gtmp = Math.floor(StartGreen * ((Step-I)/Step) + EndGreen *
(I/Step));
Btmp = Math.floor(StartBlue * ((Step-I)/Step) + EndBlue *
(I/Step));

SetbgColor (Rtmp,Gtmp,Btmp);
}
}

function FadeIn()
{
Fade(255,255,255, 0,0,0, 64);
}

FadeIn();

</SCRIPT>

Clique aqui para ver o exemplo