Getting Started with JAVASCRITP: writing a simple JavaScript program

Core Tip: write the first JavaScript program that explains how JavaScript scripts are embedded in HTML documents.

Let's use an example to write the first JavaScript program.

It shows how JavaScript scripts are embedded in HTML documents. test1.html Documents:

<ptml> <pead> </Head> </Html>

Figure 1-1 Results of the program running

Description

Test1.html is an HTML document whose identity format is in standard HTML format;

Like the HTML markup Language, JavaScript code is the text that is browsed by some word processing software that appears in the HTML-related area of the description page.

JavaScript code consists of <script Language = "JavaScript" >...</Script> description. JavaScript scripts can be added between the identity <script Language = "JavaScript" >...</Script> .

Alert () is a JavaScript window object method that pops up a string with the OK dialog box and displays ().

　

Through the <!--...//--> identification Note: If you do not know the JavaScript code browser, all the tags in it are ignored, if you know, then execute its results. Using annotations This is a good programming habit that makes it possible for others to read your language.

　　

JavaScript ends with a </Script> tag.

From the above example analysis, we can see that writing a JavaScript program is really very easy

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