arguments.length : arguments « Function « JavaScript Tutorial

Home
JavaScript Tutorial
1.Language Basics
2.Operators
3.Statement
4.Development
5.Number Data Type
6.String
7.Function
8.Global
9.Math
10.Form
11.Array
12.Date
13.Dialogs
14.Document
15.Event
16.Location
17.Navigator
18.Screen
19.Window
20.History
21.HTML Tags
22.Style
23.DOM Node
24.Drag Drop
25.Object Oriented
26.Regular Expressions
27.XML
28.GUI Components
29.Dojo toolkit
30.jQuery
31.Animation
32.MS JScript
JavaScript Tutorial » Function » arguments 
7.4.4.arguments.length

The length property contains the number of arguments that were passed into the function.

This number matches the number of elements in the arguments array associated with the Argument object.

<html>
    <form>
    <input type="button" value="A" OnClick=myFunction(this,"A","B","C")>
    <input type="button" value="B" OnClick=myFunction(this,"D","E")>
    <input type="button" value="C" OnClick=myFunction(this,"F")>
    <input type="button" value="D" OnClick=myFunction(this,"G","H")>
    <input type="button" value="E" OnClick=myFunction(this,"I")>
    </form>
    <script language="JavaScript">
    <!--
    function myFunction()
    {
      var aString = arguments[0].value;
      aString += "'s are: ";
      for(var i=1; i<arguments.length; i++)
      {
        aString += arguments[i];
        aString += ", ";
      }
      alert(aString);
    }
    -->
    </script>
    </html>
7.4.arguments
7.4.1.arguments
7.4.2.arguments.callee
7.4.3.arguments.caller
7.4.4.arguments.length
7.4.5.Use arguments.callee.toString() to get the source of the function
7.4.6.Accessing Function Arguments with the arguments Array
7.4.7.Get function parameter length
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.