JavaScript can be one of most useful additions to any web page. It comes bundled with Microsoft Internet Explorer and Netscape Navigator and it allows us to perform field validations, mouse-overs images, open popup windows, and a slew of other things.In this article I will show you how to:
- Display browser name and version number - Change text in status bar of browser - Use an input box to get text from user - Use a message box to display text to user - Change title of browser window
Before that, however, we need to know how to setup our web page so that it can run JavaScript. JavaScript code is inserted between opening and closing script tags: , like this:
These script tags can be placed anywhere on page, however it's common practice to place them between
and tags. A basic HTML page that contains some JavaScript looks like this:
My Test Page < itle> Hello
For examples in this article, you should use basic document format I have just shown you, inserting JavaScript code between tags. When you load page in your browser, JavaScript code will be executed automatically.
----------------------------------------------- Displaying browsers name and version number -----------------------------------------------
The "navigator" object in JavaScript contains details of users browser, including its name and version number. We can display them in our browser using document.write function:
document.write("Your browser is: " + navigator.appName); document.write(" Its version is: " + navigator.appVersion);
I run Windows 2000 and Internet Explorer version 6, so output from code above looks like this in my browser window:
Your browser is: Microsoft Internet Explorer Its version is: 4.0 (compatible; MSIE 6.0b; Windows NT 5.0)
----------------------------------------------- Changing text in status bar of browser -----------------------------------------------