我正在创建一个练习程序,其中按钮在交通灯中的不同图片之间交替颜色。但是,当我点击按钮时,什么也没有发生。阵列/ HTML中的函数
HTML:
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="styles.css">
<script src="jscript.js"></script>
<title>Task 3</title>
</head>
<body>
<table align="center" style="border:groove;">
<tr>
<td>
<button id="btn" onclick="switch()">Switch!</button>
</td>
</tr>
<tr>
<td> <img src="black-circle.png" class="circles" id="c1"> </td>
</tr>
<tr>
<td> <img src="black-circle.png" class="circles" id="c2"> </td>
</tr>
<tr>
<td> <img src="black-circle.png" class="circles" id="c3"> </td>
</tr>
</table>
</body>
</html>
CSS:(很简单)
@charset "utf-8";
/* CSS Document */
.circles {
width:53px;
height:54px;
}
#c1 {
}
#c2 {
}
#c3 {
}
#btn {
}
的JavaScript:
var funcSelect = [displayRed(), displayYellow(), displayGreen()];
var funcSelectOperator = 0;
function switch() {
++funcSelectOperator;
if (funcSelect == 3) {
funcSelectOperator = 0;
}
funcSelect[funcSelectOperator];
}
function displayRed() {
document.getElementById("c1").src = "red-circle.png";
document.getElementById("c2").src = "black-circle.png";
document.getElementById("c3").src = "black-circle.png";
}
function displayYellow() {
document.getElementById("c1").src = "black-circle.png";
document.getElementById("c2").src = "yellow-circle.png";
document.getElementById("c3").src = "black-circle.png";
}
function displayGreen() {
document.getElementById("c1").src = "black-circle.png";
document.getElementById("c2").src = "black-circle.png";
document.getElementById("c3").src = "green-circle.png";
}
// JavaScript Document
哪里是我定义的?我没有看到你的代码。 – Danmoreng
你的条件,如果(funcSelect == 3)有一个错字,它应该是如果(funcSelectOperator == 3) –