<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
a {
cursor: pointer;
color: red;
}
p {
display: none;
}
</style>
</head>
<body>
<a>循环切换内容</a>
<p>11111</p>
<p>22222</p>
<p>33333</p>
<script>
//可以换成切换图片等等
flag = 0;
pre = 0;
function con(){
var cons = document.getElementsByTagName("p");
document.getElementsByTagName("p")[pre].style.display = "none";
document.getElementsByTagName("p")[flag].style.display = "inline";
console.log(flag);
pre = flag;
if(flag == cons.length - 1) {
flag = 0;
} else {
++flag;
}
}
</script>
</body>
</html>
//这里要注意是cons.length-1，因为索引值是从0开始的
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
a {
cursor: pointer;
color: red;
}
p {
display: none;
}
</style>
</head>
<body>
<a>循环切换内容</a>
<p>11111</p>
<p>22222</p>
<p>33333</p>
<script>
//可以换成切换图片等等
flag = 0;
pre = 0;
function con(){
var cons = document.getElementsByTagName("p");
document.getElementsByTagName("p")[pre].style.display = "none";
document.getElementsByTagName("p")[flag].style.display = "inline";
console.log(flag);
pre = flag;
if(flag == cons.length - 1) {
flag = 0;
} else {
++flag;
}
}
</script>
</body>
</html>
//这里要注意是cons.length-1，因为索引值是从0开始的
