By Aaron Weiss

Able to make your website rock? Then try out JavaScript. it is the new scripting language everyone's speaking approximately. With JavaScript, you could construct robust applets that upload pizzazz and interactivity on your website. to exploit this new language, you wish the chief of the band, the total Idiot's consultant to JavaScript, moment variation. Its funny method of studying can have you writing JavaScript applets very quickly. you will find out how to upload multimedia, animation, sound, and extra on your web content. yet that is not all. you will additionally get an insider's view of the hot beneficial properties of JavaScript 1.1 and the way they combine with numerous internet browsers. So upload a few rhythm on your websites with the publication that does not omit a beat, the whole Idiot's advisor to JavaScript, moment Edition!Updated to hide the most recent model of Netscape Navigator and web Explorer

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Let's Make a Function! 2001 00:37:38] Complete Idiot's Guide to JavaScript Now you're ready to define a real JavaScript function. No more talk about lunch. You will build on an example that was already coded in the previous chapter. In Chapter 7, you wrote a small segment of JavaScript code that calculated the daily gross profit on product purchases via a Web page. The special exception was that every 10th purchase was free, so for every 10th purchase, a zero was added to your cumulative total.

The with Statement Yet again, you are concerned with only one object. The purpose of the with statement is to tell JavaScript which object you are currently concerned with. htm bracketed statements that follow are assumed to be properties of that object. In practice, the with statement looks like this: with ( objectname ) { statements } Imagine that you are going to assign values to the sweater object’s properties. color = black. However, you can also use the with statement in the following way: with ( sweater ) { material = cotton; color = black; size = XL; } Granted, the with statement doesn't exactly rival sliced bread or those nifty sandwich makers as far as inventions of the century go, but it does save on keystrokes, and it also helps improve the formatting and readability of the JavaScript program.

Arithmetic operators are used for basic math calculations, as well as for incrementing and decrementing numeric variables. Comparison operators are used to evaluate specified cases, such as whether one variable has a greater value than another, whether they are equal, and so forth. Logical operators evaluate comparisons against AND, OR, and NOT conditions to determine whether a series of conditions is true or false. String operators compare and/or concatenate strings of characters. Expressions are JavaScript "phrases" that yield assignments, evaluations, or results.

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