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• which is the most secure way to check variables type javascript

  - by mck89

  Hi, i need to check the type of a variable in javascript, i know 3 ways to do it: instanceof operator: if(a instanceof Function) typeof operator: if(typeof a=="function" toString method (jQuery uses this): Object.prototype.toString.call(a) == "[object Function]" Which is the most secure way to do type checking beetween these solutions? and why? Please don't tell me that the last solution is better only because jQuery uses that.

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• Perl ||= operator for PHP and Javascript

  - by zaf

  Just been re-introduced to the Perl '||=' operator from the classic Orcish Maneuver example: keys my %or_cache = @in; @out = sort { ($or_cache{$a} ||= KEY($a)) cmp ($or_cache{$b} ||= KEY($b)) } @in; Is this operator available in PHP and Javascript? And if not, do these two languages allow user defined operators?

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• Javascript static method intheritance

  - by Matteo Pagliazzi

  I want to create a javascript class/object that allow me to have various method: Model class Model.all() » static method Model.find() » static method Model delete() » instance method Model save() » instance method Model.create() » static that returns a new Model instance For static method I can define them using: Model.staticMethod(){ method } while for instance method is better to use: function Model(){ this.instanceMethod = function(){} } and then create a new instance or using prototype? var m = function Model(){ } m.prototype.method() = function(){ } Now let's say that I want to create a new class based on Model, how to inherit not only its prototypes but also its static methods?

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• does javascript have literal strings?

  - by DevelopingChris

  In c# and ruby and many other languages you can denote a string as to not need escaping. in c# its like this string s = @"\whatever\this\is"; the results are when printed \whatever\this\is my question is, is this supported in any form in javascript?

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• Query String in javascript

  - by Ajith

  By using document.referrer we will get all the reference of url in javascript.ie,may be output like follows http://localhost/testwordpress/wp-admin/admin.php?page=thesis-options&upgraded=true.From this output how can we differentiate the query string part only ( ie,?page=thesis-options&upgraded=true).Is there any method in javacript?Please help anybody knows........

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• Alias method chain in JavaScript?

  - by fig-gnuton

  In JavaScript, how could you create a new function with the same name as an existing function, while also preserving the original function so it could be called from within the new one?

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• ASP.NET Javascript Clock

  - by Mahesh

  Hi, I would like to put a clock on my webpage which should show time and a timer for a particular interval. Could you please suggest me some open source javascript to do that?? I tried unsuccessfully searching web for flash one's. Please help. Thanks, Mahesh

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• Send a JavaScript array as a JSON value?

  - by thedp

  How can I send a JavaScript array as a JSON variable in my AJAX request? Thank you.

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• JavaScript or Jquery event handlers for "ctrl"/"shift" + mouse left button click

  - by Anton

  Is it possible to handle such events as: "ctrl" + mouse left button click; "shift" + mouse left button click; "alt" + mouse left button click by using JavaScript/jquery(or other framework). If it is possible, please give a code example for it.

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• Parse Javascript Array

  - by rhepungus

  Hey all. Newbie JavaScript question here. I have an array: {r=1, g=4, b=6} How do i go about getting the value of each (r,g,b) into a separate variable?

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• JW FLV Player Javascript event

  - by Webber

  When a user triggers a Javascript action, I want the JW FLV to seek back 5 seconds from the current location. I know how to send events using player.sendEvent('SEEK',seconds). But I dont know how many seconds to pass as JS does not know the current location. Can someone please help? http://developer.longtailvideo.com/trac/wiki/FlashEvents#Viewevents.

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• PHP and Javascript code needed to check if form fields are not empty

  - by acctman

  Javascript needed to prevent form submit if any of field is empty. all my form fields start names start with name=add[FieldName] those are the fields that need checking. PHP, backend check before submiting to database double check to make sure all $POST are not empty

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• Single quotes in JavaScript object literal

  - by stone

  I'm looking at the Google Maps API tutorial, and I see this: <script type="text/javascript" src="http://www.google.com/jsapi?autoload={'modules':[{name:'maps', version:3, other_params:'sensor=false'}]}"></script> Why is modules wrapped in single quotes?

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• ASP.NET validators error message in client-side JavaScript

  - by Brian

  Hello, The error message that gets added to the validation summary when the form is invalid I need to get access to in client-side JavaScript. How do you access the actual message? My page doesn't have a ValidationSummary present, and Page_Validators[0].errormessage is *. Where is the message? Thanks.

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• cross-domain javascript

  - by rutherford

  I am producing a javascript-based widget. Nothing complex just a few document.writes... When I place it inline in the page it renders fine in all browsers. When I place it externally and load it via it fails to render in Firefox and IE but not Chrome. Anyone know why and a possible workaround?

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• Random object generator in JavaScript

  - by Gjorgji

  Hi, I need a random object generator in JavaScript that generates a variety of objects with different fields and values. Any ideas where I can find such tool? Thanks, Gjorgji.

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• which is the most accurate way to check variables type javascript

  - by mck89

  Hi, i need to check the type of a variable in javascript, i know 3 ways to do it: instanceof operator: if(a instanceof Function) typeof operator: if(typeof a=="function" toString method (jQuery uses this): Object.prototype.toString.call(a) == "[object Function]" Which is the most accurate way to do type checking beetween these solutions? and why? Please don't tell me that the last solution is better only because jQuery uses that.

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• Overriding !important style using Javascript

  - by Enrico

  Title pretty much sums it up. The external style sheet has the following code: td.EvenRow a{ display: none !important; } I have tried using: element.style.display = "inline"; and element.style.display = "inline !important"; but neither works. Is it possible to override an !important style using javascript. This is for a greasemonkey extension, if that makes a difference. Much appreciated, Enrico

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• Sorting a multidimensional array in javascript.

  - by Kyle

  How would you sort a multidimensional array in JavaScript? I have an array full of arrays that contain two dates and a string. I need the main array sorted by one of the date arrays, is this possible?

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• JSP Javascript upload file

  - by Argiropoulos Stavros

  I'm developing an web app with jsp,servlet in server side and javascript in client side. How can a i upload multiple files(images) to the server(and save them to the db)?

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• Javascript expando objects

  - by xyz

  What are expando objects in javascripts? For what purpose we need this ? Any complete example will be appreciated I found 1 article here Javascript: The red-headed stepchild of web development Thanks

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• how to display funcatoin using javascript..

  - by kumar

  hello friends.. i have two tabs,, tab1 and tab2 i have a function called execute in tab1 i need to cal that funcation in tab2 using javascript thanks

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• Validating javascript decimal numbers

  - by Click Upvote

  I'm using the following regexp to validate numbers in my javascript file: var valid = (val.match(/^\d+$/)); It works fine for whole numbers like 100, 200, etc, however for things like 1.44, 4.11, etc, it returns false. How can I change it so numbers with a decimal are also accepted?

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• Capturing Ctrl-Alt-Del in JavaScript/jQuery

  - by AJ

  While just playing with jQuery/JavaScript I ran across this problem. I could capture Alt and Ctrl keys but NOT Del and certainly not all of them together. $(document).ready(function() { $("#target").keydown(function(event) { if (event.ctrlKey && event.altKey && event.keyCode == '46') { alter("Ctrl-Alt-Del combination"); } }); }); Is it possible to capture all these three keys together?

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• Escape apostrophes inside double quoted strings (Javascript)

  - by George Sheppard

  Say i have a string that i need to evaluate in javascript such as : window.some_class.update( 'Runner', 'update_runner', '{"runner":{"id":"1","name":"Nin's Lad" } }'); In order for eval() to evaluate it, i need to escape the apostrophe in runner_name (Nin's Lad). Is this possable with regex? I dont want to escape the single quotes around Runner and update_runner. I'd just like to escape any single quotes inside double quotes. Thanks,

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