源代码 ：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>开源教程(ossoft.cn)</title> </head> <body> <p id="demo">单击按钮在数组中插入元素。</p> <button onclick="myFunction()">点我</button> <script> function myFunction(){ var fruits = ["Banana", "Orange", "Apple", "Mango"]; fruits.unshift("Lemon","Pineapple"); var x=document.getElementById("demo"); x.innerHTML=fruits; } </script> <p><b>注意:</b> unshift()方法不能用于 Internet Explorer 8 之前的版本，插入的值将被返回成<em> undefined </em>。</p> </body> </html>
运行结果