<script>
var Arraycolor = new Array("olive", "teal", "red", "blue", "maroon",
"navy", "lime", "fuschia", "green", "purple", "gray", "yellow",
"aqua", "white", "silver");
var n = 0;
function turncolors() {
if (n == (Arraycolor.length - 1))
n = 0;
n++;
document.bgColor = Arraycolor[n];
}
</script>
</head>
<body>
<form>
<INPUT TYPE=BUTTON Value="随机改变背景颜色" onClick="turncolors()">
<p style="text-align: center">用按钮随意变换背景颜色.</p>
</form>
</body>