Firebug is a firefox extension that allows you to easily find and fix javascript issues with ajax applications.
Some time ago I wrote this post where I explained some useful tips to enrich HTML Form using simple JavaScript functions. Some readers asked to me to illustrate similar examples using MooTools and unobtrusive JavaScript code, so in this tutorial I implemented the Twitter-like chars counter example of my previous post. This counter decreases, from the max value of available chars in the input field (20 in this example) to zero, while you type something into the input field:
Click on the link below to download the full code: Read the rest of this entry »
In this first lesson you can see how to manipulate element properties, in particular how to get DOM element by ID, how to use getStyle(), setStyle() (to get and set CSS properties), toInt() to convert string to number and some examples to introduce how to write unobtrusive JavaScript code with MooTools.
1. Add Mootols framework to your page
First, you have to download the latest version of MooTools and add a link to the framework within the <head> tag of the page: Read the rest of this entry »
Open config.php file (Under application/config folder) and change the following line
$config['base_url'] = “”;
to
$config['base_url'] = “http://localhost/cimenu”; //here cimenu is the folder where all the files of CodeIgniter is
Now open autoload.php file (Under application/config folder) and change the following line
$autoload['helper'] = array();
to
$autoload['helper'] = array(‘url’, ‘form’);
Now create a folder named menu under cimenu(This is the project name) folder, that is, in your root folder. Now put all the files of the external menu to the menu folder under cimenu.
Lets create a php file and name it mymenu.php under application/controller folder and write the following code: Read the rest of this entry »
Look at this example. When you hover over the box, the border, background color, and foreground colors change. This is caused by JavaScript dynamically changing the box’s CSS properties much like it does the “visibility:” property in pop up menus. This opens a whole new world of dynamic styling opportunities as most CSS properties can be accessed.
The generic form of the JavaScript reference to change a CSS property is:
document.getElementById("div_id").style.CSS_property_to_change = "new_CSS_value_in_quotes";
JavaScript does not always use the same term to refer to a property as CSS does. This is the biggest thing to keep in mind as you refer to CSS properties in JavaScript. Now lets start coding the example.
