JavaScript数组的splice()方法改变数组的内容，增加了新的元素，同时消除旧元素。
语法
array.splice(index, howMany, [element1][, ..., elementN]);
下面是参数的详细信息：
返回值:
返回基于传递的参数提取数组。
例子：
<html>
<head>
<title>JavaScript Array splice Method</title>
</head>
<body>
<script type="text/javascript">
var arr = ["orange", "mango", "banana", "sugar", "tea"];
var removed = arr.splice(2, 0, "water");
document.write("After adding 1: " + arr );
document.write("<br />removed is: " + removed);
removed = arr.splice(3, 1);
document.write("<br />After adding 1: " + arr );
document.write("<br />removed is: " + removed);
</script>
</body>
</html>
这将产生以下结果：
After adding 1: orange,mango,water,banana,sugar,tea removed is: After adding 1: orange,mango,water,sugar,tea removed is: banana