代码用于滑块切换图像.当我运行页面时,我收到此错误:
无法设置null的属性'onclick'.
HTML:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Image Slider</title>
<link rel="stylesheet" type="text/css" href="sliderswag.css">
<script language="javascript" type="text/javascript" src="imgslidescript.js"></script>
</head>
<body>
<div id="box">
<img id="main" src="http://lmetar.com/oscar1.jpg">
<img id="left" src="http://lmetar.com/left.png">
<img id="right" src="http://lmetar.com/right.png">
</div>
JavaScript的:
document.getElementById('left').onclick = slideChange;
document.getElementById('right').onclick = slideChange;
var slideNumber = 0;
function slideChange()
{
slideNumber += 1;
if (slideNumber > 3)
{
slideNumber = 1;
}
else
{
document.getElementById('main').src = 'http://lmetar.com/oscar' + slideNumber + '.jpg';
}
}