Function (mathematics) posts

Code Snippet: Keep Sidebar Elements in View When Scrolling

Whether it is a list of products you are promoting, published ads or other elements on the sidebar, you will likely want to have these elements in view at all times even when scrolling. By using JQuery, you can make this possible. To do this, use the code snippet below: //keep element in view (function($) { $(document).ready( function() { var elementPosTop = $('#sidebar-ads').position().top; $(window).scroll(function() { var wintop = $(window).scrollTop(), docheight = $(document).height(),...

PHP Ad Tracker Part IV: Displaying and Linking Ads

In our last session, we looked at the process of entering information on ad banners and ad clients, as well as generating ad activity reports. This week, we examine how to retrieve a random banner ad. We will also learn how to delete, activate and deactivate ads and clients. The getRandomAd() function retrieves a random ad by using the PHP rand() function. The function returns the ad’s primary key ID, client ID, title, URL and redirect path. The function also updates the activity table for this banner...

Creating and Manipulating Modal Popups Part II

In the last post, Creating and Manipulating Modal Popups, I discussed what the JavaScript method showModalDialog is used for and how to implement it in your website. Part two of this topic will focus on using popups to manipulate data and pass information from the child page back to the parent. User Experience ... Manipulating data in the popup window can be tricky, because modal windows do not function like normal ones. In a normal window, when your page does a postback, the postback is rendered...

Creating and Manipulating Modal Popups

Occasionally, I have needed a web page to call a child page in order to display information or to be used in a way to maintain information that will then be re-displayed back on the parent page. I didn’t want the user to be able to get back to the parent page until they have performed some function on the child page. One solution for this scenario is to use Modal Popups.  In this tutorial, I will show how to use JavaScript’s window.showModalDialog() to create a Popup window and display information....
PHP

PHP Arrays: Defining, Looping and Sorting Simple Arrays

Unlike scalar variables, which assign only a single value to a variable, an array variable can hold multiple values. Arrays are useful for holding values from database queries or web form entries, where each field (also called a “key”) holds a specific value. Let's take a look at how we define some of the arrays we use in PHP.Numbered Arrays. If the programmer does not specify a key for each value in the array, PHP automatically numbers the keys, starting from zero. This code defines an array $arrMonths[],...
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