<html lang="en">
<head>
<title>Chapter 10: Example 1</title>
</head>
<body>
<img src="usa.gif" onclick="changeImg(this)" />
<img src="mexico.gif" onclick="changeImg(this)" />
<script>
var myImages = [
"usa.gif",
"canada.gif",
"jamaica.gif",
"mexico.gif"
];
function changeImg(that) {
var newImgNumber = Math.round(Math.random() * 3);
while (that.src.indexOf(myImages[newImgNumber]) != -1) {
newImgNumber = Math.round(Math.random() * 3);
}
that.src = myImages[newImgNumber];
}
</script>
</body>
</html>
<html lang="en">
<head>
<title>Chap
阅读背景：
在Javascript程序中无法理解？
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