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分享js小白的简单问题 求解答
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>白泽南</title>
<style>
#placeholder{
height: 500px;;
width: 500px;
border: 1px solid black;
}
</style>
<script src="scripts/showPic.js" type="text/javascript"></script>
</head>
<body>
<h1 title="This is title">Snapshots</h1>
<ul>
<li id="liid">
<a href="案例研究/1.JPG" title="A fireworks display" onclick="showPic(this);return false">Fireworks</a>
</li>
<li>
<a href="案例研究/2.JPG" title="B fireworks display" onclick="showPic(this);return false">Coffee</a>
</li>
<li>
<a href="案例研究/3.JPG" title="C fireworks display" onclick="showPic(this);return false">Rose</a>
</li>
<li>
<a href="案例研究/5.JPG" title="D fireworks display" onclick="showPic(this);return false">Big Ben</a>
</li>
</ul>
<img id="placeholder" src="案例研究/155537pb4aaxk4abawq555.jpg" alt="My image Gallery">;
<script>
function countBodyChildren(){
var body_element=document.getElementsByTagName("body");
alert(body_element.childNodes[0].getAttribute("title"));
}
window.onload=countBodyChildren;
</script>
</body>
</html>
为什么我Js代码alert不执行啊
<html lang="en">
<head>
<meta charset="UTF-8">
<title>白泽南</title>
<style>
#placeholder{
height: 500px;;
width: 500px;
border: 1px solid black;
}
</style>
<script src="scripts/showPic.js" type="text/javascript"></script>
</head>
<body>
<h1 title="This is title">Snapshots</h1>
<ul>
<li id="liid">
<a href="案例研究/1.JPG" title="A fireworks display" onclick="showPic(this);return false">Fireworks</a>
</li>
<li>
<a href="案例研究/2.JPG" title="B fireworks display" onclick="showPic(this);return false">Coffee</a>
</li>
<li>
<a href="案例研究/3.JPG" title="C fireworks display" onclick="showPic(this);return false">Rose</a>
</li>
<li>
<a href="案例研究/5.JPG" title="D fireworks display" onclick="showPic(this);return false">Big Ben</a>
</li>
</ul>
<img id="placeholder" src="案例研究/155537pb4aaxk4abawq555.jpg" alt="My image Gallery">;
<script>
function countBodyChildren(){
var body_element=document.getElementsByTagName("body");
alert(body_element.childNodes[0].getAttribute("title"));
}
window.onload=countBodyChildren;
</script>
</body>
</html>
为什么我Js代码alert不执行啊
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天际的海浪 2018-04-14
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var body_element=document.getElementsByTagName("body")[0];
