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The user's browser, OS, screen size, etc. can be detected
Date and Time Handling
Q2. What is JavaScript?
Ans - JavaScript is a platform-independent,event-driven, interpreted client-side scripting and programming language developed by Netscape Communications Corp. and Sun Microsystems. Q3.How to read and write a file using javascript?
Ans - I/O operations like reading or writing a file is not possible with client-side javascript.However , this can be done by coding a Java applet that reads files for the script.
Q4.How to detect the operating system on the client machine?
Ans - In order to detect the operating system on the client machine, the navigator.appVersion string (property) should be used. Q5 .How to set a HTML document's background color?
Ans - document.bgcolor property can be set to any appropriate color.
Q6 - What does the "Access is Denied" IE error mean?
The "Access Denied" error in any browser is due to the following reason. A javascript in one window or frame is tries to access another window or frame whose document's domain is different from the document containing the script.
Q7.Is a javascript script faster than an ASP script?
Yes.Since javascript is a client-side script it does require the web server's help for its computation,so it is always faster than any server-side script like ASP,PHP,etc..
Q8.Are Java and JavaScript the Same?
Ans - No.java and javascript are two different languages.
Java is a powerful object - oriented programming language like C++,C whereas Javascript is a client-side scripting language with some limitations.
Q9.How to embed javascript in a web page?
javascript code can be embedded in a web page between <script
langugage="javascript"></script> tags
Q10 - How to access an external javascript file that is stored externally and not embedded?
Ans- This can be achieved by using the following tag between head tags or between body tags.
<script src="/abc.js"></script>
where abc.js is the external javscript file to be accessed.
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JavaScript