Functions are defined using the key word "function followed by its name and variables being passed to it in the following syntax…
A function is a block with a (possibly empty) argument list that is normally given a name. A function may give back a return value…
A function is a set of statements used to perform a specific task. Whenever a function is needed, it's "called" from somewhere within the script or from within the page itself. Functions organize scripts into different sections…
Functions and Classes
The most basic purpose of a function is to contain code. A function's advanced features are that it can take parameters and return values.
A function is a reusable code-block that will be executed by an event, or when the function is called.
How to call a function.
Function with arguments Example
How to pass a variable to a function, and use the variable in the function.
Function with arguments 2 Example
How to pass variables to a function, and use these variables in the function.
Function that returns a value Example
How to let the function return a value.
A function with arguments, that returns a value: Example
How to let the function find the sum of 2 arguments and return the result.
The SetTimeout Function
you want to set things to happen after a certain amount of time? Well, the setTimeout function can help you create some nice scripts that will use time delays to make things happen. Let's take a look at how to call the setTimeout function…
Creating a new method with a function
Learn how you Create a new method with a function…
Creating a Function
Passing Information to the Function
Putting it all together: Functions from a Function
This example is the final new topic in our tutorial. It introduces arrays. You have already learned about variables…
Introduction to Functions
Functions with No Parameters
Example of Functions with No Parameters.This HTML page contains a function called…
Parameters and Return Values
Although functions with no parameters are pretty handy for cutting down on the amount of typing you have to do and help make your HTML look better, functions that take parameters are far more useful.
Functions with More Than 1 Parameter
Here are the arrays I've defined more than one Parameter...
A function is a set of statements used to perform a specific task. Whenever a function is needed, it's "called" from somewhere within the script or from within the page itself.
Return Statements of Function
A function is a piece of code that sits dormant until it is referenced or called upon to do its "function". In addition to controllable execution, functions are also a great time saver for doing repeatable tasks.
The very moment you find yourself writing redundant code over and over again, you have a need for functions. Function is a collection of code designed to perform a distinct action…
Here is an example of how to create custom objects and properties using the Constructor Function.
Constructor Function with an Arguments
Using arguments, we've simplified the code. Rather than creating two more functions that extend the Table function for the two tds, we're using one constructor function for all the table tags.
Constructor Function Methods
This example demonstrates how to create custom methods.
Here is how you solve the problem of using the same function to open windows with different urls…
Functions are defined using…
Functions are the essential building blocks of your scripts. They are used to combine multiple statements in one place. A function can return a result, which can then be assigned to a variable.
Passing data by value and by reference
When you pass data to a function by value, this means that you are passing whatever the variable is holding, not the variable itself.
Basically functions are a way for bundling several commands together. Let's write a script which outputs a certain text three times…
Functions are blocks of code which get executed when called…
A function is a statement block that has been assigned a name…
This material covers advanced features of functions. Since functions are also intimately related to objects, we also look at some other aspects of functions when we look at objects.
Often when you are writing a program you find that there is a series of statements that you need to repeat in multiple places in the program. Rather than write these lines multiple times making your program huge, we can extract the lines into a function a
You have already seen how functions can be used to run the same group of statements from multiple places within your program…
Value of a Function
In this one you will learn how the function can also pass one value back to the calling code. This single value that is returned is considered to be the value of the function itself.
The top-level function, escape, encodes the string that is contained in the string argument to make it portable. A string is considered portable if it can be transmitted across any network to any computer that supports ASCII characters.
The top-level function, isFinite, is used to determine if the argument, testnumber, is a finite and legal number. This function returns true for a finite number and otherwise returns false.
The isNaN function is used to determine if the argument, testvalue, is a NaN…
The top-level function, number, converts the object argument to a string representing the object's value. If the value cannot be represented by a legitimate number, the "Not-a-Number" value, NaN is returned.
The top-level function, parseFloat, finds the first number in a string.
The top-level function, parseInt, find the first integer in a string…
The top-level function, string, converts the object argument to a string representing the object's value.
The taint function is deprecated…
The top-level function, unescape, decodes an encoded string argument that was created using the escape function.
The untaint function is deprecated. The Data-Tainting Security Model, which used the taint and untaint functions...
The function statement declares a function with its specified parameters, which can include numbers, strings and objects…
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