代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script>
window.onload = function () {
var image = document.getElementById("a");
var nextbtn = document.getElementById("next");
var prebtn = document.getElementById("pre");
var name_arr = ["a","b","c"];
var min = 0;
var max = name_arr.length-1;
var number = min;
nextbtn.onclick = function () {
if (number === max){
number = min;
}else {
number++;
}
new_path = "./image/"+name_arr[number]+".jpg";
image.setAttribute("src",new_path);
};
prebtn.onclick = function () {
if (number === min){
number = max;
}else {
number--;
}
new_path = "./image/"+name_arr[number]+".jpg";
image.setAttribute("src",new_path);
}
}
</script>
</head>
<body>
<img src="./image/a.jpg" alt="" id="a" width="30%"><br>
<button id="pre">上一张</button>
<button id="next">下一张</button>
</body>
</html>
目录
结果
点击按钮，图片进行切换
