Code
<script language = "JavaScript">
document.write("<form name=\"Colory\">");
document.write("<small>Цвет фона страницы:</small><br>");
document.write("<select name=\"schemesel\" OnChange=\"document.bgColor = this.options[selectedIndex].value\">");
document.write("<option value=\"FFFFFF\" selected>Белый");
document.write("<option value=\"0000FF\">Синий");
document.write("<option value=\"C0C0C0\">Серый");
document.write("<option value=\"808080\">Темно-серый");
document.write("<option value=\"FFFF00\">Желтый");
document.write("<option value=\"FFFFC0\">Ярко-желтый");
document.write("<option value=\"FF0000\">Красный");
document.write("<option value=\"00C000\">Зеленый");
document.write("<option value=\"C0FFC0\">Салатовый");
document.write("<option value=\"FF00FF\">Розовый");
document.write("</select>");
document.write("</form>");
</script>
Quote
<html>
<head>
<meta content="text/html; charset=windows-1251" http-equiv="Content-Type">
<script language="JavaScript">
theTime = new Date();
theHour = theTime.getHours();
if(theHour>6&&theHour<18){
document.write('<body background ="day.gif" text="black">');
}
else{
document.write('<body background ="night.gif" text="white">');
}
</script>
</head>
<body>
<p align="center"><font size="4"><b>Смена фона в зависимости от времени</b></font></p>
</body>
</html>
