Definition and Usage
定义于用法

The constructor property is a reference to the function that created an object.
constructor属性为所建立对象的参考函数

Syntax
语法

object.constructor

Example 1
举例

In this example we will show how to use the constructor property:
在这个举例中我们将展示如何使用constructor属性

<script type="text/javascript">

var test=new Boolean()
if (test.constructor==Array)
{document.write("这是个数组对象")}
if (test.constructor==Boolean)
{document.write("这是个布尔对象")}
if (test.constructor==Date)
{document.write("这是个日期对象")}
if (test.constructor==String)
{document.write("这是个字符串对象")}

</script>

The output of the code above will be:
输出结果为：

这是个布尔对象

Example 2
举例

In this example we will show how to use the constructor property:
在这个举例中我们将展示如何使用constructor属性

<script type="text/javascript">

function employee(name,jobtitle,born)
{
this.name=name
this.jobtitle=jobtitle 
this.born=born
}

var fred=new employee("Fred Flintstone","Caveman",1970)

document.write(fred.constructor)

</script>

The output of the code above will be:
输出结果为：

function employee(name, jobtitle, born)
{this.name = name; this.jobtitle = jobtitle; this.born = born;}

Try-It-Yourself Demos
尝试与演示

constructor - example 1
In this example we will show how to use the constructor property.
在这个举例中我们将展示如何使用constructor属性

constructor - example 2
In this example we will show how to use the constructor property.
这个举例我们将展示如何使用constructor属性

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