DHTML means dynamic hyper text markup language it combines of static HTML, cascading style sheets (CSS) and scripting. by using scripting with CSS we can manipulate document object model (DOM) to get dynamic effect of the page.
 

All data types in VBScript are variants.
 

A virtual root is essentially a new web site in IIS. You’d create one in the MMC by either selecting “New Virtual Site” from the site context menu, or clicking “Create” in the Home Directory tab in the properties for any existing folder. Using the first method, you can also create a virtual root that points to a logical directory outside the current web root. The new virtual root is largely, although not completely, as configurable as a new web site.
 

Win2K and Win2K3 comes with a limited terminal services server built in for remote administration of the server. Set it up as remote client and use the TS client or Remote Desktop Connection on the client to login. From there, use MMC as if you were logged on locally.
 

1. stay up to date on patches and keep security software (AV, firewall, IDS, maybe even packet logging, etc.) running.
2. IIS authenticates against domain users (even if the domain is “Local Machine”). Make sure you have no spurious users, and secure everyone’s passwords. If possible, segregate public web machines into different ACL segments (e.g. — a different domain).
3. Be careful with security policies. The standard server install comes with hardened LSP templates, which you should consider if you’re not experienced enough to build your own. Non-front tiers should have tight security policies barring anyone outside the adjacent tiers (and maybe a test machine or two) from access.
 

by Including the “img” tag between the “a href” tag and the “a” closing tag:
 

iisweb.vsb to create, delete, start, stop, and list Web sites, iisftp.vsb to create, delete, start, stop, and list FTP sites, iisdir.vsb to create, delete, start, stop, and display virtual directories, iisftpdr.vsb to create, delete, start, stop, and display virtual directories under an FTP root, iiscnfg.vbs to export and import IIS configuration to an XML file
 

IUSR_computername
 

Basic authentication, Digest authentication, Advanced digest authentication, Certificate-based Web transactions that use PKCS #7/PKCS #10, Fortezza, SSL, Server-Gated Cryptography, Transport Layer Security
 

On disk, as opposed to memory, as it used to be in IIS 5.
 

Non-blocking socket usage, introduced in IIS 6.0. More than one application can use a given socket.
 

Number, String, Boolean, Function, Object, Null, Undefined
 

Use the parseInt() function, that takes a string as the first parameter, and the base as a second parameter. So to convert hexadecimal 3F to decimal, use parseInt ("3F", 16);
 

&&, || and !
 

for, while, do-while loops, but no foreach.
 

obj["age"] = 17 or obj.age = 17.
 

arr[arr.length] = value;
 

It refers to the current object
 

Return true if the argument is not a number.
 

It’s a number in JavaScript, derived by dividing negative number by zero.
 

In order to detect the operating system on the client machine, the navigator.appVersion
 

This depends on the user's browser and OS.
In the case of Netscape with Windows OS,all the cookies are stored in a single file called cookies.txt

c:\Program Files\Netscape\Users\username\cookies.txt
 

Generation of HTML pages on-the-fly without accessing the Web server.
The user can be given control over the browser like User input validation Simple computations can be performed on the client's machine The user's browser, OS, screen size, etc. can be detected
Date and Time Handling
 

document.bgcolor property can be set to any appropriate color.
 

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.
 

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..
 

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.
 

javascript code can be embedded in a web page between <script
langugage="javascript"></script> tags
 

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.
 

An alert box displays only one button which is the OK button whereas the Confirm box displays two buttons namely OK and cancel.
 

A prompt box allows the user to enter input by providing a text box.
 

Breaking is possible within a string statement by using a backslash \ at the end but not within any other javascript statement.
that is ,
document.write("Hello \
world");
is possible but not
document.write \
("hello world");
 

Use the below specified style of comments
<script language=javascript>

<!--
javascript code goes here

// -->

Use // for line comments and
/*

*/ for block comments
 

Number.MAX_VALUE
Number.MIN_VALUE
 

The null value is a unique value representing no value or no object.
It implies no object, or null string,no valid Boolean value, no number and no array object.
 

Undefined value means the variable used in the code doesnt exist or is not assigned any value or the property doesn't exist.
 

(i)Undefined value cannot be explicitly stated that is there is no keyword called undefined whereas null value has keyword called null
(ii)typeof undefined variable or property returns undefined whereas
typeof null value returns object
 

No. JavaScript does not have block level scope,all the variables declared inside a function possess the same level of scope unlike c,c++,java.
 

Undeclared variables are those that are not declared in the program (do not exist at all), trying to read their values gives runtime error.But if undeclared variables are assigned then implicit declaration is done .
Undefined variables are those that are not assigned any value but are declared in the program. Trying to read such variables gives special value called undefined value.
 

==== is strict equality operator ,it returns true only when the two operands are having the same value without any type conversion.
 

The delete operator is used to delete all the variables and objects used in the program ,but it does not delete variables declared with var keyword.
 

Continue statement continues the current loop (if label not specified) in a new iteration whereas break statement exits the current loop.
 

The following example illustrates this
It creates a function called square with argument x and returns x multiplied by itself.

var square = new Function ("x","return x*x");