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What can JavaScript programs do?
What can JavaScript programs do? 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... 2010-07-20, 3799👍, 0💬

What does "1"+2+4 evaluate to?
What does "1"+2+4 evaluate to? Since "1" is a string, everything is a string, so the result is a string of "124". 2010-09-28, 3794👍, 0💬

How do you convert numbers between different bases in JavaScript?
How do you convert numbers between different bases in JavaScript? 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); 2010-06-22, 3767👍, 0💬

browser incompatibilities aside
Keeping browser incompatibilities aside, an event can be registered except: A) (input type="button" id="btn" name="btn" value="Click" onclick="handler()" /) B) document.getElementById("btn") .onclick= function() { alert("handler!"); } C) document.getElementById("btn") .addEventListener("onclick",han... 2010-08-28, 3754👍, 0💬

What is the difference between a web-garden and a web-farm?
What is the difference between a web-garden and a web-farm? Web-garden - An IIS 6.0 feature where you can configure an application pool as a web-garden and also specify the number of worker processes for that pool. It can help improve performance in some cases. Web-farm - A general term referring to... 2010-10-12, 3743👍, 0💬

How to disable an HTML object
How to disable an HTML object document.getElementById("myObj ect").disabled= true; 2011-02-15, 3739👍, 0💬

How to determine the state of a checkbox using JavaScript?
How to determine the state of a checkbox using JavaScript? Use the "checked" property of the checkbox object. For example: var checkedP = window.document.getElementById ("myCheckBox").checked; 2010-10-19, 3731👍, 0💬

The join() function allows you to:
The join() function allows you to: A) create a string out of an array. B) create an array out of a string delimited by some character. C) join two strings. D) all of the above. 2010-08-28, 3724👍, 0💬

How many times will the following loop print the word loop to the screen?
How many times will the following loop print the word loop to the screen? var index = 0; while (index < 3) { window.document.writeln("loop" );index++; } A) 1 B) 2 C) 3 D) 4 2010-08-28, 3716👍, 0💬

What does the EnableViewStateMac setting in an aspx page do?
What does the EnableViewStateMac setting in an aspx page do? Setting EnableViewStateMac=true is a security measure that allows ASP.NET to ensure that the viewstate for a page has not been tampered with. If on Postback, the ASP.NET framework detects that there has been a change in the value of viewst... 2010-11-23, 3713👍, 0💬

What is the difference of decodeURI() and encodeURI()?
What is the difference of decodeURI() and encodeURI()? Many characters cannot be sent in a URL, but must be converted to their hex encoding. These functions are used to convert an entire URI (a superset of URL) to and from a format that can be sent via a URI. &lt;script type="text/javascript"> v... 2011-08-30, 3698👍, 0💬

Can JavaScript steal text from your clipboard?
Can JavaScript steal text from your clipboard? It is true, text you last copied for pasting (copy & paste) can be stolen when you visit web sites using a combination of JavaScript and ASP (or PHP, or CGI) to write your possible sensitive data to a database on another server. 2010-08-24, 3695👍, 0💬

How to find radio button selection when a form is submitted?
How to find radio button selection when a form is submitted? &lt;script type="text/javascript"> function findButton() { var myForm = document.forms.animalForm; var i; for (i=0;i&lt;myForm.marsupial .length;i++) { if (myForm.marsupial[i].checked) { break; } } alert("You selected \""+myForm.ma... 2011-02-08, 3687👍, 0💬

What does isNaN function do?
What does isNaN function do? Return true if the argument is not a number. 2010-08-03, 3677👍, 0💬

How can JavaScript be used to personalize or tailor a Web site to fit individual users?
How can JavaScript be used to personalize or tailor a Web site to fit individual users? JavaScript allows a Web page to perform "if-then" kinds of decisions based on browser version, operating system, user input, and, in more recent browsers, details about the screen size in which the browser is run... 2010-07-27, 3669👍, 0💬

Where are cookies actually stored on the hard disk?
Where are cookies actually stored on the hard disk? This depends on the user's browser and OS. In the case of Netscape with Windows, all the cookies are stored in a single file called cookies.txt c:\Program Files\Netscape\Users\username\ cookies.txtIn the case of IE, each cookie is stored in a separ... 2010-07-20, 3667👍, 0💬

How to read and write a file using JavaScript?
How to read and write a file using JavaScript? I/O operations like reading or writing a file is not possible with client-side JavaScript. 2010-06-02, 3665👍, 0💬

Methods GET and POST in HTML forms - what's the difference?.
Methods GET and POST in HTML forms - what's the difference?. GET: Parameters are passed in the querystring. Maximum amount of data that can be sent via the GET method is limited to about 2kb. POST: Parameters are passed in the request body. There is no limit to the amount of data that can be transfe... 2010-08-17, 3661👍, 0💬

To change the presentation of an element
To change the presentation of an element, which of the following can be used? A) document.getElementById('elem1 ').style.propertyName= "value"; B) document.getElementById('elem1 ).className= "value"; C) Both a and b above D) None of the above 2010-08-28, 3660👍, 0💬

What does undefined value mean in JavaScript?
What does undefined value mean in JavaScript? Undefined value means the variable used in the code doesn't exist or is not assigned any value, or the property doesnt exist. 2011-01-18, 3652👍, 0💬

What are the problems associated with using JavaScript, and are there JavaScript techniques that you discourage?
What are the problems associated with using JavaScript, and are there JavaScript techniques that you discourage? Browser version incompatibility is the biggest problem. It requires knowing how each scriptable browser version implements its object model. You see, the incompatibility rarely has to do ... 2010-09-21, 3651👍, 0💬

How to set the focus in an element using JavaScript?
How to set the focus in an element using JavaScript? Use the "focus()" method of the element object: &lt;script> function setFocus() { if(focusElement != null) { document.forms[0].elements["my elementname"].focus();} } &lt;/script> 2010-10-19, 3639👍, 0💬

What is the eval() function?
What is the eval() function? The eval() method is incredibly powerful allowing you to execute snippets of code during exection. &lt;script type="text/javascript"> var USA_Texas_Austin = "521,289"; document.write("Population is "+eval("USA_"+"Texas_"+"Austin "));&lt;/script> This produces: Po... 2011-08-09, 3636👍, 0💬

How to Add Event Handlers?
How to Add Event Handlers? You can add an event handler in the HTML definition of the element like this: &lt;script type="text/javascript">&lt ;!--function hitme() { alert("I've been hit!"); } // --&gt; &lt;/script> &lt;input type="button" id="hitme" name="hitme" value="hit me" o... 2011-05-24, 3627👍, 0💬

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.NET C C++ CSS DBA General HTML Java JavaScript JSP JUnit MySQL Networking Oracle Perl Perl PHP PL/SQL RSS Software QA SQL Server Struts Unix Windows XHTML XML