Definition and Usage
定义与用法

The join() method is used to put all the elements of an array into a string.
join()方法可用给数组中的所有元素加入字符串中

The elements will be separated by a specified separator.
每个元素可用指定的分隔符区分开

Syntax
语法

arrayObject.join(separator)

Tips and Notes
提示与注意点

Note: Comma is the default separator for the join() method.
注意点：使用join()方法的默认分隔符号是逗号","

Example
举例

In this example we will create an array, and then put all the elements in a string:
这个举例中我们将建立一个数组，并将里面所有的元素放入字符串中：

<script type="text/javascript">

var arr = new Array(3)
arr[0] = "Jani"
arr[1] = "Hege"
arr[2] = "Stale"

document.write(arr.join() + "<br />")

document.write(arr.join("."))

</script>

The output of the code above will be:
上面代码的输出结果为：

Jani,Hege,Stale
Jani.Hege.Stale

Try-It-Yourself Demos
尝试与演示

join()
How to use join() create a string from an array.
怎样使用join()将来自数组的元素建立成字符串

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