這在我的代碼中執行一個簡單的任務;只需切換img src
。當腳本在HTML頁面內時,它工作正常,但是當我試圖將其設置爲外部文件時,它無法工作。Javascript外部文件
有什麼建議嗎?
這是外部JS:
var link = document.getElementById('btn1');
link.onclick = function switch1() {
var a = document.getElementById('img1');
var b = document.getElementById('img2');
var c = a.src;
var d = b.src;
document.getElementById('img1').src = d;
document.getElementById('img2').src = c;
}
這是HTML文件:
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8" />
<script src="JavaScript.js"></script>
<style>
.box {
position: absolute;
display: block;
background-color: wheat;
width: 90%;
height: 60%;
}
.frame {
position: relative;
display: block;
background-color: Window;
left: 10%;
top: 10%;
width: 80%;
height: 80%;
}
.content {
position: relative;
display: block;
background-color: yellow;
left: 10%;
top: 10%;
width: 80%;
height: 80%;
}
.img1 img {
position: absolute;
display: block;
left: 10%;
top: 15%;
width: 150px;
height: 150px;
}
.img2 img {
position: absolute;
display: block;
right: 10%;
top: 15%;
width: 150px;
height: 150px;
}
.button {
position: absolute;
display: block;
background-color: #4CAF50;
border: none;
color: white;
padding: 15px 32px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
margin: 4px 2px;
cursor: pointer;
top: 15%;
right: 42%;
}
</style>
</head>
<body>
<div class="box">
<div class="frame">
<div class="content">
<div class="img1">
<img src="pic/land2.jpg" id="img1" alt="img1">
</div>
<div class="img2">
<img src="pic/land1.jpg" id="img2" alt="img2">
</div>
<div class="btn">
<button class="button" id="btn1">Button</button>
</div>
</div>
</div>
</div>
</body>
</html>
放'script'標籤後,您的HTML –
或'的window.onload =功能包(){...}' – mplungjan