JavaScript for Web Design – Advantages and Disadvantages

This article discusses the good and the bad points of using JavaScript in your website designs. It points out the areas where JavaScript excels as a web based programming language and also describes situations where its use can actually detract from the performance of a website.

First of all, JavaScript is a browser based programming language that actually runs client side. This means that any code that you write in JavaScript is delivered along with your web pages and the scripts that you write actually run from within the users’ browser rather than directly on the server that is serving the web page. There are situations where JavaScript is an excellent solution for implementing neat features in a web design but there are also situations where using JavaScript can hurt your websites performance. It is my aim in this article to describe the best ways to use JavaScript and how to circumnavigate the downsides of using this versatile and powerful scripting language.

JavaScript for Web Design – The Advantages

JavaScript is an excellent solution to implement when validating input forms on the client side. This means that if a user forgets to enter his name in a form for instance a JavaScript validation function can popup a message to let him know about the omission. This is a far better solution that having a server side validation routine handle the error because the server does not have to do any additional processing. An asp or php routine could be written to achieve the same task but the JavaScript would not allow the form to be submitted unless it was completed properly in the first place, a much more robust solution!

Another area where JavaScript excels is in the creation of dynamic effects such as rollover images and scripted slideshows, where its use has become commonplace. Because JavaScript runs inside the clients browser it can be used to change the appearance of the users screen after the page has been sent by the server. This allows it to create some very impressive dynamic image effects.

JavaScript for Web Design – The Disadvantages

One of the major draw backs to using JavaScript is that it tends to severely bloat web pages. JavaScript code can quickly add up to hundreds of lines of code if you are using it to do anything even remotely interesting. That said the problem of large chunks of JavaScript code is easily solved by storing the JavaScript code off into separate JavaScript source files that have a .js extension. This cleans up your web page code because the JavaScript code is stored separately to the HTML page itself, leaving a much cleaner and more readable web page.

Because of JavaScript’s tendency to bloat web pages it can be very detrimental to the search engine friendliness of your web site. This is because when a search engine arrives at your site looking for quality content and keywords to determine what your page is al about, the last thing it wants to see is hundreds of lines of JavaScript code. Again, this problem is easily solves by neatly storing JavaScript code away in script files with a .js extension and linking to the script file in your HTML documents.

Conclusion:

JavaScript is a feature rich and useful browser based script that if used properly can achieve some great effects and improve the experience for the end user. There are drawbacks to its use in that it tends to bloat web pages. The key thing to remember is to get the best of both worlds by using JavaScript code in external script files. That way the code is separated from your content so you get all the benefit of JavaScript functionality but without the adverse effects of the associated code bloating.

The Role of Technology in Education

In the current age we live in, technology has become an important component. Every day there is some new gadget or software that makes lives easier and improves on the technology and software that already exists. Making lives easier is not, however, the only role technology plays in our lives.

Technology is playing an increasing role in education. As technology advances, it is used to benefit students of all ages in the learning process.

Technology used in the classroom helps students adsorb the material. For example, since some people are visual learners, projection screens linked to computers can allow students to see their notes instead of simply listening to a teacher deliver a lecture.

Software can be used to supplement class curriculum. The programs provide study questions, activities, and even tests and quizzes for a class that can help students continue learning outside the classroom.

Technology has also become part of many curriculums, even outside of computer and technology classes. Students use computers to create presentations and use the Internet to research topics for papers and essays.

Students also learn to use the technology available to them in computer and tech classes. This ensures that after graduation they will be able to use the technology in a work setting, which may put them ahead of someone who didn’t have access to a particular technology or software in their own school setting.

As technology advances, students have better access to educational opportunities like these. When something new and “better” is revealed, the “older” technology becomes more affordable, allowing it to be used in educational settings, even when schools are on a tight budget.

Technology has also advanced to help children even before they’ve started school. Educational video games and systems for young children helps them prepare for school and in some cases get a head start on their education.

There are people who may say children are “spoiled” by technology. Instead of being able to add a long column of numbers in their heads, for example, they turn to a calculator. Regardless of these arguments, technology is an important part of today’s society. By incorporating it into the classroom, students will be better equipped to transition from the classroom to the work place.

Understanding Sealing Material and Food Grade Concrete Sealer

Concrete counter tops are stain prone and need high maintenance. The sealers have come a long way from the simple wax and acrylic sealers to most modern epoxy sealers. With the right sealer, you can have a stain-resistant, heat-resistant, scratch-resistant, Food Grade Concrete Sealer, easy to clean, easy to maintain and smooth counter top.

Bare concrete is porous and vulnerable to staining and chemical attack. Liquids will soak into the surface, carrying stains into the concrete itself. Acidic substances like vinegar and lemon juice will dissolve the cement paste.

Sealing material characteristics that are important to clients are:

• Enhance the appearance of the concrete without degrading the look or feel

• Non-porous

• Completely resist stains from food, oil, and other household substances

• Resist heat from hot pots and pans

• Resist UV degradation and yellowing from sunlight

• Scratch-proof

Food Grade Concrete Sealer

• Easily cleaned using common household cleaning products

• Provide long term protection without the need for frequent maintenance

• Easy to repair& maintain

Sealing Materials: Sealers have two groups namely Penetrating sealers and Topical sealers.

Penetrating sealers come in the form of liquids that are applied to bare concrete, soak in, and then once wiped off and dried, are usually almost invisible.

Densifiers are water-based chemicals that react with the cement paste in the concrete. The reaction generates cementing agents that increase the strength of the surface concrete and fill the pores. The cementing agents that are generated during hardening often serve to provide some color enhancement. Densifiers are often applied before repellents.

Repellents are a concrete treatment that changes the surface tension characteristics of the concrete so that liquids bead up easily. They create a hydrophobic water-shedding effect when applied to the concrete.

Topical sealers make up the most of the sealers on the market as listed below:

Wax is the most basic sealer. Generally, a high-quality floor wax that contains carnauba and beeswax, or just pure beeswax, is used. Automotive paste wax should not be used for sealing because of the additives it contains.

Acrylic is a solvent based or water based, are the next most basic and common concrete sealers. Acrylic sealers are easy to use, available easily and relatively inexpensive. They are widely used for sealing floors and driveways, and provide modest protection. Acrylics generally provide heat resistance but are UV resistant.

Epoxy is a two-component chemical system and you need to mix them to form the coat. The chemical reaction is irreversible, and the end result is a very durable, very hard surface. Epoxies are expensive chemicals and one need to follow a proper process to apply them. There are three basic types of epoxies: solvent based, water based and 100% solids. They are key to a Food Grade Concrete Sealer. They are widely used in industrial kitchens.

Urethane are the type of sealers that has many of the Ideal Sealer characteristics. Some are a single part, and others are two part. Urethane, in general, are stain and heat resistant, provide good UV resistance, very tough and scratch resistant. They provide a glossy finish also.