كود تغير لون الخلفية للصفحة

<script language="Javascript">
<!--

function randombackground()
{
document.bgColor = getColor();
}

function getColor()
{
currentdate = new Date();
backgroundcolor = currentdate.getSeconds();
if (backgroundcolor > 44)
backgroundcolor = backgroundcolor - 45;
else if (backgroundcolor > 29)
backgroundcolor = backgroundcolor - 30;
else if (backgroundcolor > 15)
backgroundcolor = backgroundcolor - 16;
if (backgroundcolor == 0 )
return "black";
else if (backgroundcolor == 1 )
return "blue";
else if (backgroundcolor == 2 )
return "red";
else if (backgroundcolor == 3 )
return "orange";
else if (backgroundcolor == 4 )
return "yellow";
else if (backgroundcolor == 5 )
return "green";
else if (backgroundcolor == 6 )
return "violet";
else if (backgroundcolor == 7 )
return "grey";
else if (backgroundcolor == 8 )
return "white";
else if (backgroundcolor == 9 )
return "turqoise";
else if (backgroundcolor == 10 )
return "teal";
else if (backgroundcolor == 11 )
return "dark green";
else if (backgroundcolor == 12 )
return "pink";
else if (backgroundcolor == 13 )
return "olive";
else if (backgroundcolor == 14 )
return "brown";
else if (backgroundcolor == 15 )
return "lightblue";
}
//-->
</script>