<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>js,css动态切换图片</title>
<link href="css/index.css" rel="stylesheet" />
<script type="text/javascript">
function gel(id) {
return document.getElementById(id);
}
function clearLiBg() {
var mylis = gel("ulnav").childNodes;
for (var i = 0; i < mylis.length; i++) {
if (mylis[i].nodeType == 1) {
mylis[i].style.backgroundColor = "black";
}
}
}
window.onload = function() {
//给三个li都指定一个属性
var lis = gel("ulnav").childNodes;
for (var i = 0; i < lis.length; i++) {
if (lis[i].nodeType == 1) {
lis[i].onclick = function () {
//更换图片
gel("myimg").setAttribute("src", "images/" + this.innerHTML + ".png");
//所有LI颜色复原
clearLiBg();
//更换LI背景标签颜色
this.style.backgroundColor = "silver";
};
}
}
};
</script>
</head>
<body>
<div id="imgsCom" style="width: 632px; height: 412px;">
<img src="images/1.png" id="myimg" style="width: 632px; height: 412px; " />
<ul id="ulnav">
<li>1</li>
<li>2</li>
<li>3</li>
</ul>
</div>
</body>
</html>
