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每天自动替换网页背景颜色的简单方法

2012-07-23 19:28 489 查看
<script>

var c="red,green,yellow,black,"

c+=c;

c+=c;

c+=c;

c=c.split(",");

document.body.bgColor=c[(new Date).getDate()-1];

</script>

另外一种切换背景颜色或图片：

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<title>网页背景颜色自动切换</title>

</head>

<body bgColor="#ffffff" onload="chgCol(); pingpong();">

<script language="JavaScript">

<!-- Hide from JavaScript-Impaired Browsers

var pos = 10;

function initArray() {

this.length = initArray.arguments.length;

for (var i = 0; i < this.length; i++) {

this[i] = initArray.arguments[i];

}

}

var col=new initArray("4b","5b","8b","8b");

col[0] = "yellow";

col[1] = "coral";

col[2] = "orange";

col[3] = "red";

col[4] = "greenyellow";

col[5] = "lime";

col[6] = "turquoise";

col[7] = "coral";

col[8] = "blueviolet";

col[9] = "violet";

function chgCol() {

pos++;

if (pos<0||pos>9) {

pos = 0;

}

document.bgColor = col[pos];

setTimeout("chgCol()",5000);

}

var yourwords = "不斷變化背景色彩";var buffer1=" ";var buffer2=" ";var message1=buffer1+yourwords+buffer2;var dir = "left";var speed =150;function pingpong(){if (dir == "left") { message2=message1.substring(2,message1.length)+" "; window.status=message2;
setTimeout("pingpong();",speed); message1=message2; if (message1.substring(0,1) == "*") dir="right"; }else { message2=" "+message1.substring(0,message1.length-2); window.status=message2; setTimeout("pingpong();",speed); message1=message2;
if (message1.substring(message1.length-1,message1.length) == "*") dir="left"; }}// --></script>

<p align="center">　</p>

<p align="center"><b> 提示你：请等待几秒钟就可看到背景颜色的变化</b></p>

</body>

</html>
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