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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<script>
//存储被点击的图片的index.
var imgIndexClicked;
var imgs;
//设置图片的方法.参数i:从0到i为黄色,之后为空.
function setImgByIndex(i) {
for (var emp = 0; emp <= i; emp++) {
imgs[emp].src = "img/starYellow.png";
}
for (var emp = Number(i) + 1; emp < imgs.length; emp++) {
imgs[emp].src = "img/starEmpty.png";
}
}
//鼠标移动上去,根据此图片的Index,设置5个图片的src.
function setMouseover(i) {
return function () {
setImgByIndex(i);
};
}
//点击某张图片时存储该图片的index.
function setClick(i) {
return function () {
imgIndexClicked = i;
//alert("从0开始计数...第 "+i+" 个被点了.");
};
}
//鼠标离开这个图片,根据保存的被点击的图片号imgIndexClicked,设置5个图片的src.
function setMouseleave() {
setImgByIndex(imgIndexClicked);
}
onload = function () {
imgs = document.getElementsByTagName("img");
for (var i in imgs) {
imgs[i].onmouseover = setMouseover(i);
imgs[i].onclick = setClick(i);
imgs[i].onmouseleave = setMouseleave;//给的是方法,不是方法的调用.故setMouseleave();是错误的.
}
};
</script>
</head>
<body>
<img src="img/starYellow.png" />
<img src="img/starYellow.png" />
<img src="img/starYellow.png" />
<img src="img/starYellow.png" />
<img src="img/starYellow.png" />
</body>
</html>
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原文地址：http://www.cnblogs.com/fanzongjing/p/4540125.html
