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脚本说明:
第一步:把如下代码加入<body>区域中
<center>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
var rand1 = 0;
var useRand = 0;
images = new Array;
images[1] = new Image();
images[1].src = "image1.gif";
images[2] = new Image();
images[2].src = "image2.gif";
images[3] = new Image();
images[3].src = "image3.gif";
images[4] = new Image();
images[4].src = "image4.gif";
function swapPic() {
var imgnum = images.length - 1;
do {
var randnum = Math.random();
rand1 = Math.round((imgnum - 1) * randnum) + 1;
} while (rand1 == useRand);
useRand = rand1;
document.randimg.src = images[useRand].src;
}
// End -->
</script>
<a onClick="swapPic();"><img name="randimg" src="image1.gif" tppabs="http://www.csdn.net/javascript/image1.gif"></a><br>
<font face="Verdana" size="-2">click image to change</font>
</center>
第二步:把<body>区域中内容改为:
<body bgcolor="#fef4d9" OnLoad="swapPic()">
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