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Web Dev + WordPress + Security
Category: HTML
74 posts

Quick Reminder About Downlevel-Revealed Conditional Comments..

As more and more people discover the flexibility, specificity, and all-around usefulness of Microsoft’s proprietary downlevel conditional comments, it behooves us to reiterate the importance of utilizing proper syntax. Specifically, for downlevel-revealed, or negative, conditional comments, the commented content will remain visible unless the associated if condition proves false. Continue reading »

Content Negotiation for XHTML Documents via PHP and htaccess

In this article, I discuss the different MIME types available for XHTML and explain a method for serving your documents with the optimal MIME type, depending on the capacity of the user agent. Using either htaccess or PHP for content negotiation, we can serve complete, standards-compliant markup for our document’s header information. This is especially helpful when dealing with Internet Explorer while serving a DOCTYPE of XHTML 1.1 along with the recommended XML declaration. According to the RFC standards1 produced […] Continue reading »

CSS/(X)HTML Tutorial: Hovering Accessibility Jump Menu

Recently, a reader named Don asked about this theme’s accessibility (accesskey) jump menu located at the top of each page. Several people have commented that they like the way the jump menu “lights up” upon gaining focus. Whenever a user hovers their cursor over the region at the top of the page, all links in the jump menu change to a more visible color. Then, as the cursor moves over the various menu items, each jump link is further highlighted […] Continue reading »

XHMTL/CSS Remix: Creative Commons License

Not too long ago, I played with the idea of releasing article content under a Creative Commons (Attribution-NonCommercial-ShareAlike 2.0) License. At the time, I wanted to host my own copies of the two associated CC license pages. During the process of uploading the pages to my own server, several minor adjustments (regarding image paths, etc.) needed to be made to the source code. After tweaking a few things in the XHTML code, I began snooping around in the pages’ CSS […] Continue reading »

Error-Free Feed-Validation Links for Feedburner-Redirected Feeds

Just a quick tip on how to create error-free links to feed validation services for feeds that are redirected through Feedburner. For example, let’s say our site’s main feed is originally located at: Continue reading »

What is the Difference Between XHTML 1.0 Strict and XHTML 1.1?

As some of you (e.g., Louis) may have noticed during the recent site redesign, I decided to switch the default doctype from XHTML 1.0 Strict to XHTML 1.1. Just in case you were wondering, XHTML 1.1 is different than XHTML 1.0 in three important ways1: On every element, the lang attribute has been removed in favor of the xml:lang attribute On the a and map elements, the name attribute has been removed in favor of the id attribute The “ruby” […] Continue reading »

Important Note for Your Custom Error Pages

Just a note to web designers and code-savvy bloggers: make sure your custom error pages are big enough for the ever-amazing <cough> Internet Explorer browser. If your custom error pages are too small, IE will take the liberty of serving its own proprietary web page, replete with corporate linkage and poor grammar. How big, baby? Well, that’s a good question. In order for users of Internet Explorer to enjoy your carefully crafted custom error pages, they need to exceed 512 […] Continue reading »

How to Add Meta Noindex to Your Feeds

Want to make sure that your feeds are not indexed by Google and other compliant search engines? Add the following code to the channel element of your XML-based (RSS, etc.) feeds: <xhtml:meta xmlns:xhtml="http://www.w3.org/1999/xhtml" name="robots" content="noindex"></xhtml:meta> Here is an example of how I use this tag for Perishable Press feeds (vertical spacing added for emphasis): Continue reading »

Open External Links as Blank Targets via Unobtrusive JavaScript

Beginning with this article, I am serving up a short series of unobtrusive JavaScript functions that I use to enhance the functionality of Perishable Press. In this post, I present a comprehensive JavaScript method of opening external links in new windows (or tabs, depending on the browser). Continue reading »

Prevent JavaScript Elements from Breaking Page Layout when Following Yahoo Performance Tip #6: Place Scripts at the Bottom

By now, everyone is familiar with the Yahoo Developer Network’s 14 best-practices for speeding up your website. Certainly, many (if not all) of these performance optimization tips are ideal for high-traffic sites such as Yahoo or Google, but not all of them are recommended for smaller sites such as Perishable Press. Nonetheless, throughout the current site renovation project, I have attempted to implement as many of these practices as possible. At the time of this writing, I somehow have managed […] Continue reading »

New Mobile CSS Styles for Perishable Press

The amount of time I spend surfing the Web from a mobile device has steadily increased since the acquisition of my new favorite mobile device. Unfortunately, many sites have yet to implement (or even consider) support for mobile devices. Without proper formatting, such sites are virtually useless, requiring unnecessary download times, displaying unreadable pages, and serving unusable content. Given the inevitable ubiquity of mobile access to the World Wide Web, providing reasonable support for handheld browsers is becoming increasingly important. […] Continue reading »

Position Absolute Horizontal and Vertical Center via CSS

Recently, a reader named Max encountered some scrolling issues while implementing our absolutely centered layout technique. Of course, by “absolutely centered” we are referring to content that remains positioned dead-center regardless of how the browser is resized. After noticing the scrollbar deficiency, Max kindly dropped a comment to explain the issue: the div solution works well, only one problem maybe somebody can help: if you make the browser window smaller then the div is -> the scrollbar doenst fit right […] Continue reading »

Bare-Bones HTML/XHTML Document Templates

In this post I have assembled a concise collection of conforming, bare-bones document templates for just about every DOCTYPE for HTML, XHTML, and more. Continue reading »

Rethinking Structural Design with New Elements in HTML 5

HTML 5, also known as Web Applications 1.0, provides new markup elements that will change the way you design your web pages. The new elements replace commonly used divisions in web documents, facilitating an even greater degree of separation between structure (HTML) and presentation (CSS). Indeed, in many documents, the new elements will structure the document while providing enough hooks to render obsolete previously required divisions, classes, and identifiers. Let’s take a look.. Continue reading »

Essential HTML Entities

Virtually every article written here at Perishable Press requires at least one or two “special” HTML characters. Some of these characters — such as quotation marks, hyphens, and dashes — are very common, while others — such as the copyright symbol, bullet, and arrow — happen less frequently. The vast majority of special characters, however, like the latin Ä (i.e., capital letter “A” with a diaeresis), and the mathematical symbol ⊃ (i.e., superset), rarely see the light of day on […] Continue reading »

Wrapping Your Head around Downlevel Conditional Comments

If you think you understand the logic behind Microsoft’s downlevel conditional comments, you are sadly mistaken. Sure, they seem simple enough on the surface, but as you really try to wrap your head around how and why they work, the subtle complexities of downlevel conditional comments may leave you dazed and confused… In our previous article on Internet Explorer’s exclusive browser-detection method, downlevel conditional comments (DCC), we present an introductory exposition, defining expressions and providing several generalized code examples. Overall, […] Continue reading »

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Perishable Press is operated by Jeff Starr, a professional web developer and book author with two decades of experience. Here you will find posts about web development, WordPress, security, and more »
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