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• How do can I have a dropdown list(select HTML) where i want to have one of the options where i allow

  - by Mo

  Hi I want to have a drop down menu where a user can select from several predefined options but i also want to give him the option of inserting a user specific value, i was thinking having one of the options as "user specific" which will in turn allow the user to insert a user specif entry in a text box that appears or is editable when user selects the "user specific" option. any one have any ideas how i can implement this is HTML and Javascript? thank you

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• Why is `goog.Disposable.call(this);` necessary?

  - by David Faux

  In this snippet of Google Closure javascript code involving a constructor, why is goog.Disposable.call(this); necessary? Doesn't Foo already inherit from Disposable with goog.inherits(foo, goog.Disposable);? goog.provide('foo'); /** * @constructor */ foo = function(){ goog.Disposable.call(this); } goog.inherits(foo, goog.Disposable); foo.prototype.doSomething = function(){ ... } foo.prototype.disposeInternal = function(){ ... }

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• Is it bad practice to not assign a new object to a variable?

  - by Jeff

  Is it bad javascript practice to not assign a newly created object to a variable if you're never going to access it? For example: for(var i=0;i<links.length;i++){ new objectName(links[i]); } And again, I won't be accessing it, so there's no need for a variable to reference it.

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• remove params from form request

  - by joe

  Hello folks, Upon user interaction, I need to remove certain input params from an HTML form before submission. Using javascript to remove the input fields from the DOM doesn't seem to actually remove the params from being sent through the request. Is there a way to delete or clear the actual request params?

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• Validate a string

  - by Activist

  I'm not that good with regular expressions... I need a JavaScript regular expression that will do the following: The string can contain letters (upper and lower case), but not punctuations such as éàïç... The string can contain numbers (0..9) anywhere in the string, except on the first position. The string can contain underscores (_). Valid strings: foo foo1 foo_bar fooBar Invalid strings: 1foo -- number as first character foo bar -- space föo -- punctuation ö Many thanks!

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• Remove Chrome Loading Notification?

  - by Yottagray

  I am working on a project that runs in Chrome in full-screen mode and displays data that can be edited and interacted with. It makes AJAX calls(using jQuery) frequently that cause a loading notification in the lower left-hand corner on the bottom of the screen to pop up. These notifications are distracting when you are viewing the display and I would like to remove/prevent Chrome from displaying these loading notifications at all. Is it possible to prevent these notification by any means, or perhaps even mask the javascript that causes these notifications?

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• Kill unload function in JS?

  - by Newbie

  Hello! Is there a way to kill the unload function with javascript(jquery)? I am looking for something like this: window.onbeforeunload = function(){ confirm("Close?") } or in jquery: $(window).unload(function() { confirm("close?") }); Now, on window unload I get my confirm alert but it will continue in any case. Clicking cancel it won't stay on my page. Can U help me plz?

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• What are the js recursion limits for Firefox, Chrome, Safari, IE, etc?

  - by Maciek

  I've got some Javascript code which uses fairly deep recursion and I'd like to find out what the recursion limits in the various browsers are (i.e. the point at which the error "too much recursion" will happen). Anyone have any solid numbers on this, by version?

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• show div for a set time, then hide it

  - by Patrick

  Im using jquery for various things on my site, but one thing im not sure how to do, is have it show an element, then wait X seconds, and hide the element. $('#form').ajaxForm(function() { $('#cartcontents').fadeOut("fast").load('cart.php').fadeIn("fast"); }); That's the JavaScript that I'm using now. How could I have it (when the form submits) display the div #notice for 5 seconds, then fadeOut?

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• parsing non-strict json, one in which keys are not enclosed in quotes, with Java

  - by Nishan

  I am trying to parse a string which in JSON format only that keys are not enclosed in quotes. I can very well parse this string in Javascript, but can not find a Java API which will help me parse this. All the APIs I tried assumes strict JSON format. Can anyone suggest a library which has an option to parse this, or a whole new approach to the problem (say like use regex instead) ?

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• IE Positioning Help.

  - by _henry

  I’m currently working on this theme : http://tf.ffffffive.com/fancy/ I just need a few pointers on how to get it working in IE6 and IE7 . -The positioning is a bit off. -If you guys have a helpful blog post of maybe give me a hand with some CSS coding I would really appreciate it. Also the Javascript scrolling effect isn't working correctly due to the positioning. Any tips would be appreciated. Thanks, Henry

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• Replace first character of string

  - by MgS

  I have a string |0|0|0|0 but it needs to be 0|0|0|0 How do I replace the first character ('|') with (''). eg replace('|','') (with JavaScript)

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• object required error

  - by stack5

  where is error? <script type="text/javascript"> document.write(parent.document.getElementById('ifr2').src) </script>

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• Why not always use https when including a js file?

  - by Jones

  For what reasons do sites provide logic to switch between http/https protocols for JavaScript include files? Why not always use https?

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• Database design for business numbers

  - by Rob Morris

  I'm in need of some help, I need to store the information below into a database, what would the relational database structure be for this: Then I need to create a dropdown for the insurance company followed by another dropdown depending on what the first dropdown selected value was, then once both selects have been chosen display the relevant telephone number. I guess i need to query the database, then display the dropdowns using javascript(jquery) or Ajax?

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• How can I check, if a scrollbar is visible?

  - by brainfck

  Hi, I want to display a "Go to top"-Link on my website. This link should only be visible, if the vertical scrollbar is visible. How can I do this using JavaScript? Thanks

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• trim a string in jquery

  - by amit

  i need to trim a string to its first 100 characters using jquery/javascript. also is it possible to scan a string and look for a particular combination of keywords such as #key? thanks a lot for the help.

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• List of All Background Images in DOM

  - by AutomaticDrone

  What's the best way to find all of the background images on a given page using javascript? The ideal end result would be an array of all of the url's.

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• Captcha Decoded

  - by Web Lover

  Hi, I have seen some captchas being decode using javascript, php, etc. How do they do it? For example, very popular megaupload site's captcha has also been decoded.

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• How to get all elements inside "div" that starts with a known text

  - by misha-moroshko

  Hello, I have a div element in HTML document. I would like to extract all elements inside this div that starts with a known text (e.g. "q17_"). How can I achieve this using JavaScript ? (If needed, for simplicity, I can assume that all elements inside the div are of type input or select.) Thanks !

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• How to run jQuery onClick? Need to pass a variable to run .ajax

  - by user205307

  I'm trying to run .ajax and insert a data element from the onClick of an item from the page. Whats the best way to do this? Something like this: function grabinfo(foo){ $.ajax({ url: "infospitter", method: "GET", data: "id="+foo, success: function(html){ $(#showstuff).html(html); } }); } <input onClick="javascript:grabinfo(18343)" /> // and on page each item will have this button input

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• Pasting non-text data into browser-based apps

  - by John

  Imagine I want a user to be able to copy-paste a selection of pixels from MSPaint into a browser-based app. Is this possible using JavaScript in any current browsers? Will it become possible in HTML5? If not, is it feasible using something like Flex/Silverlight, or is it simply not possible at this time, and you'd have to save a file and manually upload it?

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• Change css class depending on label's text

  - by abatishchev

  I have asp:Table with number of asp:Label inside asp:FormView, it represents short stats info. I need to set Label.CssClass to "red" if it's text isn't "0". Currently I do this on FormView.DataBound event. But think that it's better to use JavaScript and probably jQuery. How can I do that?

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• Getting Javasctipt Object key list

  - by basit74

  I have a Javascript Object like var obj = { key1: 'value1', key2: 'value2', key3: 'value3', key4: 'value4' } How can I get the length and list of keys in this object.

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• Dynamic Text limit when users writes in a textbox (HTML)

  - by DomingoSL

  Hello, I need to implement in Html/javascript (or php is possible) a script which works like twitter, when the user writes text in a field a label change showing the characters left. Can you help me with a simple and easy script example?

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