генерирует цвета 
пример:http://mast.worldbyte.net/ruletka/
<head>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
color=new Array("0","8","F");
speed=250;
document.bgColor="FFFFFF";
bg=new Array("FFFFFF","FFFFFF","FFFFFF");
function begin() {
document.form.col1.value=" X "; document.form.col2.value=" X ";
document.form.col3.value=" X "; i=0; roll(speed);
}
function roll(speedB) {
if (document.form.col1.value==" X ") {
document.form.c1.value=document.form.b1.value;
document.form.b1.value=document.form.a1.value;
document.form.a1.value=
color[Math.round(Math.random()*10)%3]+
color[Math.round(Math.random()*10)%3];
}
if (document.form.col2.value==" X ") {
document.form.c2.value=document.form.b2.value;
document.form.b2.value=document.form.a2.value;
document.form.a2.value=
color[Math.round(Math.random()*10)%3]+
color[Math.round(Math.random()*10)%3];
}
if (document.form.col3.value==" X ") {
document.form.c3.value=document.form.b3.value;
document.form.b3.value=document.form.a3.value;
document.form.a3.value=
color[Math.round(Math.random()*10)%3]+
color[Math.round(Math.random()*10)%3];
}
setTimeout("roll("+speedB+")",speedB);
}
function stop(col) {
if (col==1) {document.form.col1.value=" ";i++;}
if (col==2) {document.form.col2.value=" ";i++;}
if (col==3) {document.form.col3.value=" ";i++;}
if (i==3) {
bg[0]=document.form.a1.value+
document.form.a2.value+
document.form.a3.value;
bg[1]=document.form.b1.value+
document.form.b2.value+
document.form.b3.value;
bg[2]=document.form.c1.value+
document.form.c2.value+
document.form.c3.value;
speedB=500000;roll(speedB);
}
}
function view(letter) {
document.bgColor=bg[letter];
document.form.color.value="#"+bg[letter];
}
// End -->
</script>
</head>
<?php
echo '
<center>
<form name="form">
<table cellpadding="2">
<tbody><tr><td align="center">
<input type="text" name="a1" size="2" onfocus="this.blur()" value=" ">
<input type="text" name="a2" size="2" onfocus="this.blur()" value=" ">
<input type="text" name="a3" size="2" onfocus="this.blur()" value=" ">
<input type="button" onclick="view(0)" value="Показать"><br>
<input type="text" name="b1" size="2" onfocus="this.blur()" value=" ">
<input type="text" name="b2" size="2" onfocus="this.blur()" value=" ">
<input type="text" name="b3" size="2" onfocus="this.blur()" value=" ">
<input type="button" onclick="view(1)" value="Показать"><br>
<input type="text" name="c1" size="2" onfocus="this.blur()" value=" ">
<input type="text" name="c2" size="2" onfocus="this.blur()" value=" ">
<input type="text" name="c3" size="2" onfocus="this.blur()" value=" ">
<input type="button" onclick="view(2)" value="Показать"><br>
<input type="button" onclick="stop(1)" value=" X " name="col1">
<input type="button" onclick="stop(2)" value=" X " name="col2">
<input type="button" onclick="stop(3)" value=" X " name="col3">
</td>
<td valign="middle" align="center">
<input type="button" onclick="begin()" value="Начать"><p>
<table bgcolor="FFFFFF" border="1" cellspacing="0">
<tbody><tr><td align="center" valign="middle">Нажать "X" для остановки.<p>
Цвет фона = <input type="text" size="7" value="#FFFFFF" name="color">
</td></tr>
</tbody></table>
</td></tr>
</tbody></table>
</form>
</center> ';
?>
Рулетка Цветов