Author: Liew Voon Kiong

In JavaScript, using comparison operators allows us to write decision making procedures . If a certain condition is met, JavaScript will execute an action, otherwise there is no action or it will take alternative action. The following are the comparison operators:

• x==y
• x!=y
• x>y
• x<y
• x>=y
• x<=y

You need to use the if and elseif keywords together with the comparison operators to write the decision making procedures.

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The ability to perform search is one of the key functions of any programming languages. We don’t have to look very fast, just take a look at Google, the most popular search engine in the world. Due to its exclusive and highly effective search algorithm, it commands a major portion of the search engine market, and hence the search advertising market. In fact, it captured more than 60% of the Internet advertising market!

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You can create an advanced search box in JavaScript that allows the user to search for books in a certain category.

Check out the script…

You can create a list box using JavaScript and then let the user change selection options dynamically.

Check out the script and see it in action here:

http://javascript-tutor.net/Javascript_Samples/options.html

JavaScript is not just a scripting language, it can also perform arithmetic calculations! Best of all, it can interact with online users by receiving data from them, operate on the data and then display the output to the users.
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