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Function Object

There are several ways to define a function in JavaScript:

Function Statement:

function functionname(arguments){ //standard function
statements...
}

function (arguments){ //unnamed function. JavaScript 1.2.
statements...
}

Constructor:

new Function(arguments, body)

Related Tutorials

• Functions and creating your own functions
• Robust functions via the arguments array
• Using named arguments in JavaScript functions

Properties

Methods

Examples

Arguments(x)

This function below alerts the number of arguments passed into it:

function tellme(){
alert(arguments.length)
}

tellme(1,2,3) //alerts 3
tellme("George", "Tom") //alerts 2