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Search found 32581 results on 1304 pages for 'javascript common difficulties and misconceptions'.

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Add 'x' 30 mins blocks to time string (javascript)

- by Mikey1980

I have a 24 hour time string (ie 16:30) and would like to add x time blocks of 30 mins. For example if x = 4, then 16:30 + 4(30) = 18:30. Is there any easy way to do this with out exploding the string and doing if statements for mins/hours.. etc? Also this is on a php page would it be easier to do this in php then echo it to the javascript? Thanks for the help!

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What is href=javascript:;

- by vetri

in a code which i am goin through there is a link has href=javascript:; in code.when it is clicked it opens a lightbox to show some msg with close button.how is it done.I think this uses dojo

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Learning Javascript vs. jQuery

- by Maen

I got the Wrox.Beginning.JavaScript.3rd.Edition and wanted to start learning it from scratch, then my boss came along and said that why bother, learn jQuery. Can I understand jQuery and work with it although I am a newbie and have limited knowledge in ASP.net, vb.net, some C#, and basic HTML?!

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How check javascript not to open the same window with window.open function

- by Dmitriy

Hello! In my javascript i want to open URL in new window with this method: var win = window.open(url...); How can i check this, not to open the same window and lose all inputted data. For example, if i opened "www.musite.com/addproduct" URL in new window, input data, leave my work place. then i click open window again, new window open and i lost all my data.

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Detect last week of each month with javascript

- by Alex

Hi, what would be a way in javascript to detect the last week of each (current) month. Or last monday of the month?

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Is there a way to use javascript to remove all changes that javascript has made to an element's css?

- by Razor Storm

For example, <html> <body> <img id="pic" src="original.jpg"/> </body> </html> In Javascript (jQuery): $("#pic").attr("src","newpic.jpg"); Now, is there a way to reset #pic's src to original.jpg without explicitly setting it as $("#pic").attr("src","original.jpg");?

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Number of bits in Javascript numbers

- by Misha Moroshko

I work in Javascript with integer numbers only (mainly adding numbers and shifting them). I wonder how big they can be without loosing any bits. For example, how big X can be such that 1 << X will represent 2^X ?

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improve javascript prototypal inheritance

- by Julio

I'm using a classical javascript prototypal inheritance, like this: function Foo() {} Naknek.prototype = { //Do something }; var Foo = window.Foo = new Foo(); I want to know how I can improve this and why I can't use this model: var Foo = window.Foo = new function() { }; Foo.prototype = { //Do something }; Why this code doesn't work? In my head this is more logical than the classical prototypal inheritance.

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slanted design via html css and javascript ?

- by Nehal Rupani

How can i achieve http://jdstiles.com/java/angledtext2.html this kind of angle(slant) using html , css and javascript. In design we have tabular structrer and by clicking on a tab the area beneath should refresh without reloading page (some thing like jquery or ajax).

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Which JavaScript graphics library has the best performance?

- by DNS

I'm doing some research for a JavaScript project where the performance of drawing simple primitives (i.e. lines) is by far the top priority. The answers to this question provide a great list of JS graphics libraries. While I realize that the choice of browser has a greater impact than the library, I'd like to know whether there are any differences between them, before choosing one. Has anyone done a performance comparison between any of these?

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accessing php javascript object in asp.net user control

- by Khushi

Hi, I have a website in php which is using 4 frames(top, left, middle and right). The middle frame contains the web user control coded in asp.net. Now, in the right frame( which is coded in php ) some javascript contains the id of the items selected in right frame. I need to get those ids to the middle frame on asp.net user control. How can i do this?

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my layout breaks in IE7 and javascript page reloads make the screen blink

- by chibineku

My layout breaks if I change the window size in IE7/AOL, so I added a simple javascript function that fires on window.onresize, but no matter how I change the location I get problems. It was suggested I post a link and here it is: link text I already use PHP to detect browser and include an IE7-only inline stylesheet (and for mobile browsers), and my page looks nearly identical to the way it does in FF, Opera, Chrome, Safari and IE8, but when I change the window size, some things go wonky, and come back into line if you refresh. Any advice is welcome :)

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How to make in Javascript full screen windows (stretching all over the screen)

- by user63898

How can I make full screen in JavaScript that works in IE, Firefox and Opera. When I mean full screen I mean one that takes all of your screen

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Javascript & SEO

- by fighella

How can I tell if a google bot is reading my javascript generated content? I have an AJAX script that generates some text dynamically on a page... this content does not change by user, but simply by date/time. I am not sure how I can tell if google sees it.

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JavaScript code compression

- by Yashwant Chavan

Is there is way to compress JavaScript code? e.g. function test(){ // some code here } after compression it should be function test(){//some code here} Also, I need vise versa at the time of editing the code.

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Getting references to local variables created during eval() in JavaScript

- by David Parunakian

In the scenario below, how can I get references to the variables declared during eval()? function test() { eval("var myVariable = 5"); var locals = magic() // TODO What should we do here? alert(locals["myVariable"]); // returns myVariable } Just a note: JavaScript being evaluated comes from a trusted source.

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when to use === operator check in JavaScript?

- by ptrn

As the title states; when should you use the === operator check when using JavaScript, and when not to. _L

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Parsing returned array in javascript

- by Dan

I'm making a call to PayPal's credit card processor, and after a successful/unsuccessful transaction it returns me a string that looks like this: DoDirectPayment failed: Array ( [TIMESTAMP] = 2010%2d05%2d02T23%3a33%3a28Z [CORRELATIONID] = 8c503f5c6c861 [ACK] = Failure [VERSION] = 51%2e0 [BUILD] = 1268624 [L_ERRORCODE0] = 10527 [L_SHORTMESSAGE0] = Invalid%20Data [L_LONGMESSAGE0] = This%20transaction%20cannot%20be%20processed%2e%20Please%20enter%20a%20valid%20credit%20card%20number%20and%20type%2e [L_SEVERITYCODE0] = Error [AMT] = 90%2e00 [CURRENCYCODE] = USD ) I'm not a javascript pro, but how exactly can I turn that into a parseable array? Thank you!

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Expression builder in Javascript or jQuery?

- by morpheous

I am searching for an expression builder GUI (like the one used in Microsoft Access). It can be plain Javascript or JQuery plugin. I am loathe to build my own and reinvent the wheel if one already exists - and yet, a search on Google does not find anything remotely useful. Is anyone aware of any such library/plugin or article that covers this?

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Javascript equivalent of Python's iterkeys() dictionary method

- by saltycrane

In Python I can use the iterkeys() method to iterate over the keys of a dictionary. For example: mydict = {'a': [3,5,6,43,3,6,3,], 'b': [87,65,3,45,7,8], 'c': [34,57,8,9,9,2],} for k in mydict.iterkeys(): print k gives me: a c b How can I do something similar in Javascript?

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How can I call mouseover event handler programmically in JavaScript

- by michael

Hi, In my html, I have an html element with a mouseover event handler. Can you please tell me if it is possible for me to invoke that event handler programmically in JavaScript? Thank you.

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jQuery + sexy alerts + javascript menus

- by BibiBuBu

Good Day! i am working on page which has Javascript Menus (dont know how made, i think they are in compressed form) Jquery Sexy Alerts now my problem is that when i want to add any type of jquery calender, it wont work :(, i have tried different possibilities found here, but yet invain. Can somebody guide me. OR some body give me suggestion to use a calender that is compatible with any other framework. help is appreciated. Thanks

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JavaScript replace()

- by d3020

I'm trying to use the replace function in JavaScript and have a question. strNewDdlVolCannRegion = strNewDdlVolCannRegion.replace(/_existing_0/gi, "existing" + "newCounter"); That works. But I need to have the "0" be a variable. I've tried: _ + myVariable +/gi and also tried _ + 'myVariable' + /gi Could someone lend a hand with the syntax for this, please. Thank you.

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Basic framework for presentations using HTML5 + javascript

- by Brian C

Do you know a framework for making presentations using only HTML5 and javascript technologies? I'm not talking about "export" features of various presentation software (powerpoint or OOo presentation). Some requirements for the presentations made with this "framework": take advantage of the latest HTML5 features (audio, video, canvas?) same with CSS3 (font support, gradient, shadows, transitions and transformations) If there's no such thing, example of good presentations or pointers on the subject would be appreciated.

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What does "javascript:void(0)" mean?

- by Shore

<a href="javascript:void(0)" id="loginlink">login</a> I've seen such hrefs many times, but I don't know what exactly that means.

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