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How might you unobtrusively enhance the jQuery Datepicker class?

- by Teflon Ted

You can pass special strings into jQuery's Datepicker class setDate() method like "+7" which will be translated into "7 days from today": http://docs.jquery.com/UI/Datepicker#method-setDate But you can't get that "+7" back out. When you call getDate() you get the calculated resulting date. I have a use case where I need to pull out the special string "+7" for propagation. One chunk of code is passing a special string into the Datepicker and passing the Datepicker over to another chunk of code which pulls out the date, but the latter sometimes needs to know the special string rather than the calculated date. So I need to enhance the Datepicker tool to (a) store the special code internally and (b) expose it via a method like getOriginallyPassedInDate() or some such. I'm not a jQuery/Javascript ninja so I could really use some guidance on how I might preferably-unobtrusively add the necessary functionality to the Datepicker class, the way you might monkey-patch an object in Ruby I'm guessing.

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ASP.NET: How to "reset" validation after calling Page_ClientValidate

- by Josh Young

I have an ASP.NET page with a jQuery dialog that is displayed to change some data. I am setting up the jQuery dialog so that when the user clicks the OK button it calls ASP.NET's Page_ClientValidate('validationGroup') via javascript, finds all the invalid controls and changes their CSS class. So here's the scenario: the user opens the dialog, keys in some invalid data, clicks OK (receiving the validation messages), and then clicks Cancel. Now the dialog is closed, but the validation messages are still there, so that when they open the dialog again, the data goes back to the way it was initially, but the form is still in the invalid state (the validation messages are still displaying). What I need is a "reset" function of sorts to call after calling Page_ClientValidate('validationGroup'). Does this exist?

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How do I setup a shared session between two users on my Ruby on Rails powered site?

- by ben

Hey guys, The website that I'm building includes a section where two users can interact. I think I know how to do most of it, except the actual session sharing part. I'm using Ruby on Rails & Javascript (jquery), and I've got user login and session management all working okay. Would the best way to create a shared session be to have a SharedSession model, with accompanying database table, with participant1ID, participant2ID etc? Is there a better way? Thanks so much for reading!

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Dynamically replace HTML element in UIWebView

- by Skie

I have some HTML loaded in WebView like this: <html><head></head><body>before <myTag>Content</myTag> after</body></html> I want to replace element myTag with custom text so it should look like: <html><head></head><body>before ____MY_CUSTOM_TEXT___ after</body></html> Also I can't change initial HTML. How I can do this with JavaScript? My not finished code: var elements = document.getElementsByTagName( 'myTag' ); var firstElement = elements[0]; var parentElement = firstElement.parentNode; var html = parentElement.innerHTML; parentElement.innerHTML = html.replace(?????, '____MY_CUSTOM_TEXT___'); I don't know how to get string value of element to replace (?????).

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Understanding Incrementing

- by Chad

For example this: var a = 123; var b = a++; now a contains 124 and b contains 123 I understand that b is taking the value of a and then a is being incremented. However, I don't understand why this is so. The principal reason for why the creators of JavaScript would want this. Is this really more useful than doing it the PHP way? What is the advantage to this other than confusing newbies?

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Preventing user from inserting *

- by user990635

I'm trying to prevent user from inserting * in a textbox. This is what I was trying to do, but here it only detects * if this is the only inserted character. For example texts like: *, etc. When allowed characters are mixed with *, then it cannot detect it. For example inputs such as: *hjh, etc.. and maybe how to make it replace only * with "" and not the whole field? <script type="text/javascript"> function testField(field) { var regExpr = new RegExp("[^*]"); if(!regExpr.test(field.value)) { field.value = ""; } } </script> <input type="text" id="searchGamesKeyword" class="searchGamesTextBox" name="searchGamesKeyword" onblur="testField(this);" />

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Generate custom marker (icon) out of two images in Leaflet

- by Rmatt

In Javascript/CoffeeScript, using Leaflet to display a map, I would like to have custom markers out of a two custom images, and also featuring a shadow for the pin : I want to have a "background" image with a color (or shape) to identify the category On top, I want to have inside this image a specific image (logo) for each pin I didn't find out how I could do that... Setting one image is quite easy but I don't know how to overlay them. I could also consider using a tool to superpose/group/overlay these images (locally ?) before in order to send only one to the Icon Leaflet Class, but also there, I wouldn't know which tool to use. Nevertheless, I still think that a double overlay would be more efficient and that my case could be useful for several people.

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Robust way to display an image with one fixed dimension

- by DomingoSL

Lets say that we have an image uploaded by the user, the upload script limits the mb but not the image size (so could be any proportion, 600X200,200X350, and so...). Im already showing this image in one part on my site using the twitter bootstrap image handler written on css, thats good for a profile picture, the problem is that now I want that image to be a cover (like facebook/twitter cover image), my site is responsive so the width of the cover is 900px or 100% if the screen resolution is less than 900px wide. The height is always fixed to 200px. So I know there is a way to control the correct image display using CSS (maybe with jquery too) but Im not a front-end dev, Im a php dev and I dont want to use server side scripts for doing this. So im looking for suggestions or pieces of codes (css, javascript) to start with, I belive that it have to be an already made solution for this, but I dont find any on google. Thanks for any advice!

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Jquery Help : Draggable to Sortable and then back to draggable again.

- by Swamy g

I have a pool of items in the drag list which is connected to a sortable using connectToSortable option. Now I want to remove some items from this sort list and move them back to the drag list. Sort of like an undo. Suppose the user moves some 5 items to sort list and decides he/she wants only 4 items, and decides to just drag the unwanted item from the sortlist TO the drag list. How do I accomplish this WITHOUT adding a "remove" link in the sort list. Thanks a lot. For more information please refer to http://the-stickman.com/web-development/javascript/jquery-dropping-items-from-a-draggable-list-to-a-sortable-list/

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How do I modify a string printed by a script?

- by Liso22

I'm having problems with wordpress mishandling accented characters, or maybe the problem is with some plugin. Whichever the case I need to "translate" some strings, removing accents which i do with: $value = strtr($value, $trans); I really need to change this string which renders the user's location but it's printed with a script so I have no idea how to do it: <script language="javascript"> document.write('' + geoip_city() +''); </script> Is there a way to assign it's result to a php value beforehand or something? Maybe removing the accents with a script. I really need to modify it, how could I manage to do it? Thanks

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node.js storing gamestate, how?

- by expressnoob

I'm writing a game in javascript, and to prevent cheating, i'm having the game be played on the server (it's a board game like a more complicated checkers). Since the game is fairly complex, I need to store the gamestate in order to validate client actions. Is it possible to store the gamestate in memory? Is that smart? Should I do that? If so, how? I don't know how that would work. I can also store in redis. And that sort of thing is pretty familiar to me and requires no explanation. But if I do store in redis, the problem is that on every single move, the game would need to get the data from redis and interpret and parse that data in order to recreate the gamestate from scratch. But since moves happen very frequently this seems very stupid to me. What should I do?

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jquery dynamic stracture with Eq

- by mapet

i want to make a single submission with dynamic jquery script but it doesn't worked what wrong with my code? $(document).ready(function(){ $("#foo").each( function( i ) { $("button#foo").eq(i).click(function() { var a = this.value(); alert(a); }); }); }); <div id="tabs-1"><input type="type" value="one"><button id="foo"></button></div> <div id="tabs-2"><input type="type" value="two"><button id="foo"></button></div> <div id="tabs-3"><input type="type" value="tree"><button id="foo"></button></div> thanks mapet

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Form variable does not refresh with ajax call

- by ChrisOPeterson

I'm building a simple email sending form and wanted to make it with ajax. The form submits correctly the first time but if you make any subsequent changes to the text in the form and then submit again then jquery does not pick up on the changes and posts the old data. Whats going on? <script type="text/javascript"> var $j = jQuery.noConflict(); $j(document).ready(function() { var submit_url = "mail_submit.php"; var send_email = $j("#sendemail"); send_email.click(function() { var form = $j("#post"); $j.post(submit_url, form.serialize(), function(data) { alert(data); }); }); });

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How to access radioButton individual items?

- by vikitor

Hello, I've got 2 radio button groups showed differently depending on the value selected on another radio button. The thing is that I would like to set the default value of the group to the first element in the radiobutton group, but when I change from the other radio button it preserves the value previously selected, when I want it to be reset to the default value. I've been searching in the javascript repository but apparently I cannot access like it says with radio[1].checked = true... It says that radio[1] is undefined, but radio is an HTML Input element object. I'm accessing it from a different file, but var radio = document.getElementById("radio") works, but I can't access the individual radiobuttons. Thank you in advance

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How to open an html file using the default file handler and to give the window a name (i.e. target)?

- by paul

I am writing a warm-up script for a SharePoint server. The idea is to call stsadm and then open an html file containing iframes which touch all the key web pages in my portal. So far so good. The problem is that each time the script is run, a new browser window is opened and I end up with a screen full of browsers. The first idea was to close the browser after 10 minutes or so. This would be easy to do except that Javascript is disabled when an html file is opened from the file system. I then thought I might be able to open the file and set it in a named window (target) which would be reused each time the script runs but I haven't found any way to do this. Does anyone have any ideas? Either to force JS to run or to set the window name or another solution? Thanks.

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document.forms.gallery_form.submit is not a function

- by Keene Maverick

I swear, I have this exact thing working on another page. I'm such a javascript noob it's embarrassing... function delete_gallery() { var gallery = document.getElementById('gallery_id').value; var form = document.getElementById('gallery_form'); form.setAttribute('action', 'index.php?action=delete&section=galleries&id='+gallery); document.forms['gallery_form'].submit(); } Inspecting the element shows that it's updating the action correctly : <form method="post" action="index.php?action=delete&section=galleries&id=12" name="gallery_form" id="gallery_form"><input type="hidden" value="12" id="gallery_id" name="gallery_id"><p>Name: <input type="text" name="name" value="Woo"></p><p>Description:<br><textarea name="description">Dee</textarea><input type="hidden" value="2" name="artist"></p><p><input type="submit" value="Submit" name="submit"> </p></form> Here's the button I use to call the function, it's in a table below the form: <button onclick="delete_gallery()" type="button">Delete Gallery</button>

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Refreshing <div> and load data from php

- by forgatn

I have on my page and there is a tag where is some and values filled from mySQL DB. I need some JavaScript I think. When I select one option, I want to display in this propriate DATAs which are in DB. without refreshing whole page. Can you tell me how to do it, if you know that please?:) <div id="country1" class="tabcontent"> <label>Choose protocol</label> <SELECT name="cisloprot"> <?php $con = mysql_connect("localhost", "root", "123456"); $sql = "SELECT kod FROM prot GROUP BY kod"; $rs = mysql_query($sql,$con); while ($r = mysql_fetch_array($rs)) { echo "<OPTION VALUE=".$r['kod'].">".$r['kod']."</OPTION>"; } ?> </SELECT> </div>

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Dropdown menu getting hidden by images

- by Bob

I have a set of dropdown menus across the top of a web page. Below is text and some images. When I hover over the top of each menu the menu then expands below as expected but while it overlaps any text on the page it is hidden behind any images. I set the z-index to 9999 and the position is set to absolute. I found if I lower the opacity of the images to say 0.6 then the menu will overlap it. So one solution would be to detect when the menu is being hovered over and then in JavaScript or JQuery temporarily reduce the opacity of the rest of the page until the cursor moves off the menu. If so I'm not sure how to do that but is that the best approach?

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get html content of next element with a defined classname

- by Carasuman

i have problems with jquery.. If i have this code to fill tooltip div <div id="tooltip"></div> <div class="tooltipMessage">Tooltip Message</div> <script type="text/javascript"> $("#id").html($("#tooltip").next(".tooltipMessage").html()); </script> Works, the code takes the next element with classname "tooltipMessage" and fills element with id "tooltip". But if i have this code: <div id="tooltip"></div> <p>other element</p> <div class="tooltipMesage">Tooltip Message</div> Returns "undefined". How i can take html from the next element with classname "tooltipMessage" if exists another element in middle ? Thanks for help!.

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Specific position for tooltip

- by Fiona

Hello, I have a layer which opens up as a tooltip everytime I hover a button. I simply did that by creating a JS function which displays or hides the layer. Now, I am not a pro in JavaScript. My problem is the following: when the button is scrolled towards the top oft he screen I want the tooltip opening below – and if the button is near the bottom of the screen I want the tooltip opening above. Right now I just did it with absolute positioning. But obviously that doesnt do the trick. Who can help? Thanks!

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How to start up your .NET program from web browser?

- by Ole Jak

Could you provide example of JavaScript function for starting up application installed on your computer from a web browser (eg google chrome 4). It particular if .Net APPs have any special simplifying this process apis of out there are some libs for such staff, please share link with us. so how to create and store in run on start up programs a small local server which would handel some local urls like http://localhost/maAppServer/MyAppCalculator/Start for starting apps that have written in its config file their names and local urls on install? So how to start up your C# .NET app\program from web browser?

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any ideas for avoiding duplicate code in C# and javascript

- by ooo

i have an asp.net mvc website where i build up most of the page using C# for example building up html tables given a set of data from my viewmodel i also have a lot of javascript that then dynamcially modifies these tables (add row for example). the javascript code to add a new row looks extremely similar to my "rendering" code i have in C# that is used to build up the html table in the first place. Every time i change the c# code to a add a new field, i have to remember to go back to the javascript code to do the same. is there a better way here?

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ctrl-c does not copy text on a webpage

- by aepheus

I've come across this several times, ctrl-c randomly does not copy. I think it's caused by javascript or maybe some odd html syntax. I never spent the time to track down what caused it. Anyone know the typical/common causes of ctrl-c not working (to copy) on a website? Speaking from a developers standpoint. What do we developers end up doing to break ctrl-c? Just to clarify, I'm not interested in preventing copying. I'm trying to do the opposite, occasionally I find I've done something that is preventing ctrl-c from copying text, and that is not very user friendly on a text heavy site.

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Preloading images in HTML, is there a more modern way?

- by John

I have an image loaded by JS on a mouse event. It's a fairly big image so I want to make sure it gets pre-loaded. I reemmber some old techniques from years ago and found this example: <SCRIPT LANGUAGE = JAVASCRIPT> if (document.images) { img1 = new Image(); img2 = new Image(); img1.src = "imageName1.gif"; img2.src = "imageName2.gif" } </SCRIPT> I wondered if this is still good/relevant, or maybe browsers automatically detect unused images and preload them anyway? Note my page has to support IE6, so I might still need older techniques anyway, but I'm still interested if more modern browsers have a better way?

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Bind event to shape on canvas

- by Ben Shelock

How can I bind an event to a shape drawn on a canvas? I presumed this would work but I get an error. <html> <head> <script type="application/javascript"> function draw() { var canvas = document.getElementById("canvas"); var ctx = canvas.getContext("2d"); ctx.fillStyle = "rgb(200,0,0)"; var rec = ctx.fillRect (0, 0, 55, 50); rec.onclick = function(){ alert('something'); } } </script> </head> <body onLoad="draw()"> <canvas id="canvas" width="300" height="300"></canvas> </body> </html>

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