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• Deriving an HTMLElement Object from jQuery Object

  - by Jasconius

  I'm doing a fairly exhaustive series of DOM manipulations where a few elements (specifically form elements) have some events. I am dynamically creating (actually cloning from a source element) several boxes and assigning a change() event to them. The change event executes, and within the context of the event, "this" is the HTML Element Object. What I need to do at this point however is determine a contact for this HTML Element Object. I have these objects stored already as jQuery entities in assorted arrays, but obviously [HTMLElement Object] != [Object Object] And the trick is that I cannot cast $(this) and make a valid comparison since that would create a new object and the pointer would be different. So... I've been banging my head against this for a while. In the past I've been able to circumvent this problem by doing an innerHTML comparison, but in this case the objects I am comparing are 100% identical, just there's lots of them. Therefore I need a solid comparison. This would be easy if I could somehow derive the HTMLElement object from my originating jQuery object. Thoughts, other ideas? Help. :(

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• full duplex communication over the web w/o flash sockets

  - by aharon

  A web application I'm helping to develop is faced with a well-known problem: we want to be able to let users know of various events and so forth that can occur at any time, essentially at random, and update their view accordingly. Essentially, we need to allow the server to push requests to individual clients, as opposed to the client asking the server. I understand that WebSockets are an effort to address the problem; however, after a bit of looking around into them, I understand that a) very few web browsers currently offer native websocket support; b) to get around this, you either use flash sockets or some sort of AJAX long-polling; c) a special websockets server must be used. Now, we want to offer our service without Flash. And any sort of servers must have some sort of load-balancing capabilities, or at least some software that can do load balancing for them. As of 2008, everyone was saying that Comet-based solutions (e.g., Bayeux) were the way to go for these sort of situations. However, the various protocols seem to have not had much work put into them since then—which leads (finally) to the question. Is Bayeux-flavored Comet still the right tool for jobs like this? If not, what is?

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• Trying to access a specific option value to generate a popup window

  - by Isaac

  I am trying to use a click event to generate a popup window based off of the specific value chosen. I am having trouble with the if statement and trying to access each specific option value. Can any of you give me some hints? <select id="offices"> <option value="Choose an Office">Choose an Office</option> <option value="Residential Education (ResEd)" >Residential Education (ResEd)</option> <option value="Dean of Students">Dean of Students</option> <option value="Office of Student Affairs">Office of Student Affairs</option> <option value="Vice-Provost of Student Affairs">Vice-Provost of Student Affairs</option> </select> </div> function display(){ var officearray = [{ Office: "Residential Education (ResEd)", ID: "725-2800", Description: "The Office of Residential Education is responsible for developing the policies, programs, and staffing which support the intellectual, educational, and community-building activities in student residences. Second Floor. " }, { Office: "Dean of Students", ID: "723-7833", Description: "The Dean of Students office is composed of 13 individual administrative units that are concerned with the general welfare of both undergraduate and graduate students, in and out of the classroom. Second floor." }, { Office: "Office of Student Activities (OSA)", ID: "723-2733", Description: "Services for student organizations, student-initiated major events and programs, and fraternities and sororities. Second floor." }, { Office: "Vice-Provost of Student Affairs", ID: "725-0911", Description: "The Vice Provost for Student Affairs is responsible to the Provost for providing services and programs to undergraduate and graduate students in support of the academic mission of the University. Second floor." }] for(var i = 0; i < officearray.length; i++) { var o = document.getElementById("offices") var oString = o.options[o.selectedIndex].value; newwindow2 = window.open('', 'name', 'height=200, width=150') var tmp = newwindow2.document if (oString == officearray[i].Office) { tmp.writeln(officearray[i].Description) } } } document.getElementsByTagName('option').addEventListener("click",display,false)

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• Retrieve click() handler in jQuery for later use

  - by Xiong Chiamiov

  I'm using the jQuery tablesorter plugin to sort a table, which assigns .click() handlers to the <th>s in the table. Since my table has alternating colors for each column, I've built a simple fix_table_colors(identifier) function that does as it should when I call it manually using Firebug. I would like, however, to have that automatically called after a sort. To do this, I decided to retrieve the .click() handler from the <th>s, and assign a new handler that simply calls the previous handler, followed by fix_table_colors(). (This SO question is similar, but uses standard onClick() attributes, which won't work here.) From the accepted answer to this question, I have created the following code: $(document).ready(function() { $("table.torrents").tablesorter({ debug: true, headers: { 1: { sorter: 'name' }, 2: { sorter: 'peers' }, 3: { sorter: 'filesize' }, 4: { sorter: 'filesize' }, 5: { sorter: 'filesize' }, 6: { sorter: 'ratio' } } }); $('table.torrents thead th').each(function() { var th = $(this); var clickHandler = th.data('events').click[0]; th.click(function() { clickHandler(); fix_table_colors('table.torrents'); }); }); }); While this is conceptually correct, clickHandler doesn't appear to actually be a function, and so I cannot call it. With a bit more digging in Firebug, I found that click[3] appears to hold the function I'm looking for (and click[10] my new one). I get an 'e is undefined' error on line 2 of tablesorter.min.js when using that, though. Am I even going down the right path? I have a feeling that with what I've found so far, I can make this work, but it's going to be much uglier than I would expect it needs to be.

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• using the window object for accessing global user defined objects and using text within html for cre

  - by timpone

  I don't do very much jquery / javascript but wanted to ask for some advice on the following piece. I have tried to cut out as much as possible. Most of this was semi-inherited code with catching a bunch of events just hardcoded in. I'd like to generalized them more by putting the object name in the html and accessing via jquery on processing (by_date, by_popularity). I retriev as string and access the object via window[current_obj]. Is this a good way to do this or am I missing something? Are there preferable ways to introduce specificity. thanks for any advice. <script> var by_date={}; by_date.current_page=1; by_date.per_page=4; var by_popularity={}; by_popularity.current_page=1; by_popularity.per_page=4; $(function(){ $('.previous.active').live('click',function(){ window[current_obj].current_page--; process(window[current_obj]); }); }); function process(game_obj){ //will process and output new items here } </script> <div class="otherContainer"> <a class='previous active'>Prev</a><div style="display:none;">by_date</div> | <a class='next'>Next</a><div style="display:none;">by_date</div> </div> <div class="topPrevNextContainer"> <a class='previous active'>Prev</a><div style="display:none;">by_popularity</div> | <a class='next'>Next</a><div style="display:none;">by_popularity</div> </div>

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• backbone.js removing template from DOM upon success

  - by timpone

  I'm writing a simple message board app to learn backbone. It's going ok (a lot of the use of this isn't making sense) but am a little stuck in terms of how I would remove a form / html from the dom. I have included most of the code but you can see about 4 lines up from the bottom, the part that isn't working. How would I remove this from the DOM? thx in advance var MbForm=Backbone.View.extend({ events: { 'click button.add-new-post': 'savePost' }, el: $('#detail'), template:_.template($('#post-add-edit-tmpl').html()), render: function(){ var compiled_template = this.template(); this.$el.html(compiled_template); return this; }, savePost: function(e){ //var self=this; //console.log("I want you to say Hello!"); data={ header: $('#post_header').val(), detail: $('#post_detail').val(), forum_id: $('#forum_id').val(), post_id: $('#post_id').val(), parent_id: $('#parent_id').val() }; this.model.save(data, { success: function(){ alert('this saved'); //$(this.el).html('this is what i want'); this.$el.remove();// <- this is the part that isn't working /* none of these worked - error Uncaught TypeError: Cannot call method 'unbind' of undefined this.$el.unbind(); this.$el.empty(); this.el.unbind(); this.el.empty(); */ //this.unbind(); //self.append('this is appended'); } });

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• Storing arbitrary data in HTML

  - by Rob Colburn

  What is the best way to embed data in html elements for later use? As an example, let's say we have jQuery returning some JSON from the server, and we want to dump that datat out to the user as paragraphs. However, we want to be able to attach meta-data to these elements, so we can events for these later. The way I tend to handle this, is with some ugly prefixing function handle_response(data) { var html = ''; for (var i in data) { html += '<p id="prefix_' + data[i].id + '">' + data[i].message + '</p>'; } jQuery('#log').html(html).find('p').click(function(){ alert('The ID is: ' + $(this).attr('id').substr(7)); }); } Alternatively, one can build a Form in the paragraph, and store your meta-data there. But, that often feels like overkill. This has been asked before in different ways, but I do not feel it's been answered well: http://stackoverflow.com/questions/432174/how-to-store-arbitrary-data-for-some-html-tags http://stackoverflow.com/questions/209428/non-standard-attributes-on-html-tags-good-thing-bad-thing-your-thoughts

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• checking and replacing a value in an array jquery

  - by liz

  i have a table of data: <table id="disparities" class="datatable"> <thead> <tr> <th scope="col">Events</th> <th scope="col">White</th> <th scope="col">Black</th> <th scope="col">Hispanic</th><th scope="col">Asian/Pacific Islands</th> </tr> </thead> <tbody> <tr> <th scope="row">Hospitalizations</th> <td>0.00</td> <td>20</td> <td>10</td> <td>5</td> </tr> <tr> <th scope="row">ED Visits</th> <td>19</td> <td>90</td> <td>40</td> <td>18</td> </tr> </tbody> </table> i have a function that retrieves the values from the above table into an array like so (0.00,19) var points1 = $('#disparities td:nth-child(2)').map(function() { return $(this).text().match(/\S+/)[0]; }).get(); i want to check if there is a 0.00 value (or it could be just 0) and change that value to NA... so my resulting array is then (NA,19) not really sure how to go about this, whether in the initial match or as a separate action...

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• deleting cookie at the end of a process

  - by RyanP13

  Hi, I am using the following plug in for cookies in jQuery: https://code.google.com/p/cookies/ The issue i am having is not with the plugin but when and how to delete the cookie at the end of a quoting process. The site i am using this on is a six step online quote and buy process. There is Omniture event serialisation sitestat tracking applied to some of the pages. This event serialisation has to include the name of the event and a random number of which i create. I have a generic function for this which i call at the bottom of the page like so: serialEvent('event21:', 'payment'); Here is the function: function serialEvent(eventNumber, eventName) { var sessionID = jaaulde.utils.cookies.get('sessionID'); var remLength = 20 - eventName.length; var remSession = sessionID.substr(sessionID.length - remLength, remLength); var eventName = eventName + remSession; s.events = eventNumber + eventName; } I need to delete the cookie at the end of the process, the Thank you page but i also need the cookie 'sessionID' for the 'serialEvent' function. As the function is called at the bottom of the page should i just write the cookie delete after it? Is that robust enough? I need to be sure that the function has successfully been called before the cookie is deleted. The code for deleting the cookie is quite simple: jaaulde.utils.cookies.del('sessionID'); Thanks :)

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• jquery live and callbacks via wcf services

  - by vondip

  Hi all, I am writing a web app with asp.net, c# and jquery. Most of the time I'm writing dynamic html to the browser and using different web services to get the content needed. My call to the service: function WriteProducts(currentIndex, selectedCategoryId, callback) { var d = new Date(); MyAppServices.GetProducts(selectedCategoryId, currentIndex, 8, d.getTime().toString(), callback, function func() { alert('failure'); }); } The request usually gets translated to this (using firebug I monitored it): http://localhost:8080/MyApp/MyAppServices.svc/GetProducts?categoryId=0&fromIndex=0&toIndex=8&randomNumber=%221271800014441%22 The problem starts when part of the html controls dynamically rendered need to respond to click events. This is when I start using jquery's live method: $('.filter').live('click', function(event) { WriteProducts(0, selectedCategoryId, PopulateDivs); }); Now from some reason, the request passed to the server becomes this: http://localhost:8080/MyApp/MyAppServices.svc/GetProducts?categoryId=**%2217%22**&fromIndex=0&toIndex=8&randomNumber=%221271799783355%22 where did these %22 come from? If I take them out, the request passes successfully. I have no idea who inserted these %22, but they are causing havoc here! Guys, do you perhaps have a clue?

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• Is there a default way to get hold of an internal property in jQueryUi widget?

  - by prodigitalson

  Im using an existing widget from the jquery-ui labs call selectmenu. It has callback options for the events close and open. The problem is i need in these event to animate a node that is part of the widget but not what its connected to. In order to do this i need access to this node. for example if i were to actually modify the widget code itself: // ... other methods/properties "open" : function(event){ // ... the original logic // this is my animation $(this.list).slideUp('slow'); // this is the orginal call to _trigger this._trigger('open', event, $this._uiHash()); }, // ... other methods/properties However when in the scope of the event handler i attach this is the orginal element i called the widget on. I need the widget instance or specifically the widget instance's list property. $('select#custom').selectmenu({ 'open': function(){ // in this scope `this` is an HTMLSelectElement not the ui widget } }); Whats the best way to go about getting the list property from the widget?

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• Interactive World Map, highlight countries on mouseover

  - by BrenGG

  I need to create an interactive world map on the front page of a site, the view portal will be about 650x200 pixels. The interactivity would include the following, mouse-over a country would highlight (the countries are will literally be filled with "red" for example) that country and display the countries' name (preferably text in a div), I will also be linking the highlighting event with a that will highlight a country when selected. I am having a difficult time finding a suitable solution, I refuse to use or learn a proprietry technology such as flash so it is not an option. I created a simple mockup using openlayers and a custom map image but the countries' markers load too slowly in IE6. Also svg seems too large, as I tried to use RaphaelJS, but abondoned it when I realised the world map data is 1.2mb which is totally un acceptable for the front page of a site.. I am really at a loss on how I am going to do this, my last resort is to manually create 250+ (however many countries there are) pngs and apply mouseover events to hotspots in the image... but this is probably going to be a dead end too.. desperately seeking a solution, any helpful comments will be appreciated!

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• JQuery autocomplete problem

  - by heffaklump

  Im using JQuerys Autocomplete plugin, but it doesn't autocomplete upon entering anything. Any ideas why it doesnt work? The basic example works, but not mine. var ppl = {"ppl":[{"name":"peterpeter", "work":"student"}, {"name":"piotr","work":"student"}]}; var options = { matchContains: true, // So we can search inside string too minChars: 2, // this sets autocomplete to begin from X characters dataType: 'json', parse: function(data) { var parsed = []; data = data.ppl; for (var i = 0; i < data.length; i++) { parsed[parsed.length] = { data: data[i], // the entire JSON entry value: data[i].name, // the default display value result: data[i].name // to populate the input element }; } return parsed; }, // To format the data returned by the autocompleter for display formatItem: function(item) { return item.name; } }; $('#inputplace').autocomplete(ppl, options); Ok. Updated: <input type="text" id="inputplace" /> So, when entering for example "peter" in the input field. No autocomplete suggestions appear. It should give "peterpeter" but nothing happens. And one more thing. Using this example works perfectly. var data = "Core Selectors Attributes Traversing Manipulation CSS Events Effects Ajax Utilities".split(" "); $("#inputplace").autocomplete(data);

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• How does Backbone.js connect View to Model

  - by William Sham

  I am trying to learn backbone.js through the following example. Then I got stuck at the point ItemView = Backbone.View.extend why you can use this.model.get? I thought this is referring to the instance of ItemView that would be created. Then why would ItemView has a model property at all?!! (function($){ var Item = Backbone.Model.extend({ defaults: { part1: 'hello', part2: 'world' } }); var List = Backbone.Collection.extend({ model: Item }); var ItemView = Backbone.View.extend({ tagName: 'li', initialize: function(){ _.bindAll(this, 'render'); }, render: function(){ $(this.el).html('<span>'+this.model.get('part1')+' '+this.model.get('part2')+'</span>'); return this; } }); var ListView = Backbone.View.extend({ el: $('body'), events: { 'click button#add': 'addItem' }, initialize: function(){ _.bindAll(this, 'render', 'addItem', 'appendItem'); this.collection = new List(); this.collection.bind('add', this.appendItem); this.counter = 0; this.render(); }, render: function(){ $(this.el).append("<button id='add'>Add list item</button>"); $(this.el).append("<ul></ul>"); _(this.collection.models).each(function(item){ appendItem(item); }, this); }, addItem: function(){ this.counter++; var item = new Item(); item.set({ part2: item.get('part2') + this.counter }); this.collection.add(item); }, appendItem: function(item){ var itemView = new ItemView({ model: item }); $('ul', this.el).append(itemView.render().el); } }); var listView = new ListView(); })(jQuery);

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• How to place a DIV over jw player when certain condition is met?

  - by Derek

  JW player can either playback video in flash or html5. I use a countdown timer in my app between certain videos. Right now the countdown timer is being displayed in a div beneath the jw player. I need to get that timer displayed in a div that covers the entire jw player interface. I'm stuck and could use some help. Here is some of the javascript code: jwplayer("container").setup({ 'file': 'devplaylist.xml', 'flashplayer': 'js/player.swf', 'plugins': { './countdown.js': {} }, 'repeat': 'list', 'autostart': true, 'height': 390, 'width': 720, events: { onPlaylist: function(event){ ... ... } onPlaylistItem: function(event){ ... ... var minutes = (Math.floor(time/60 )); var seconds = time % 60; if (seconds < 10) seconds = "0" + seconds; var text = minutes + ":" + seconds; document.getElementById('resttimer').innerHTML = text; //I need to have a DIV display the value of text (the countdown time) //directly over the jw player time--; }, 1000); ... ...} Any help is appreciated, DK

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• How to implement a log window in a web browser?

  - by Jeremy Friesner

  Hi all, I'm interested in adding an HTML/web-browser based "log window" to my net-enabled device. Specifically, my device has a customized web server and an event log, and I'd like to be able to leave a web browser window open to e.g. http://my.devices.ip.address/system_log and have events show up as text in the web browser window as they happen. People could then use this as a quick way to monitor what the system is doing, without needing run any special software. My question is, what is the best way to implement this? I've tried the obvious approach -- just have my device's embedded web server hold the HTTP/TCP connection open indefinitely, and write the necessary text to the TCP socket when an event occurs -- but the problem with that is that most web browsers (e.g. Safari) don't display the web page until the server has closed the TCP connection has been closed, and so the result is that the log data never appears in the web browser, it just acts as if the page is taking forever to load. Is there some trick to make this work? I could implement it as a Java applet, but I'd much prefer something more lightweight/simple, either using only HTML or possibly HTML+JavaScript. Also I'd like to avoid having the web browser 'poll' the server, since that would either introduce too much latency (if the reload delay was large) or put load on the system (if the delay was small)

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• Form iteration function not working properly

  - by Moses

  My function is supposed to iterate all forms in the document, and bind an onclick function to each 'calculate' element int he form. The problem is, the function that executes on any of the click events executes in the context of the the last i in the loop. Here is the JavaScript that I'm using: window.onload = function(){ calculateSavings(); } function calculateSavings(){ for (i = 0; i < document.forms.length; i++) { var e = document.forms[i]; e.calculate.onclick = function() { var hours = e.hours.value; var rate = e.rate.value; alert(hours * rate); } } } And here is the HTML it is attached to: <!doctype html> <html> <body> <form> <label for="hours">Hours: </label><input type="text" id="hours" name="hours"> <label for="rate">Rate: </label><input type="text" id="rate" name="rate"> <input type="button" name="calculate" value="Calculate"> <div id="savings"></div> </form> <form> <label for="hours">Hours: </label><input type="text" id="hours" name="hours"> <label for="rate">Rate: </label><input type="text" id="rate" name="rate"> <input type="button" name="calculate" value="Calculate"> <div id="savings"></div> </form> </body> </html> I'm sure this is a really basic question but the solution is completely eluding me at this point.

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• Updating Embedded Video in Firefox

  - by Slevin

  I am working on a Videos page where my intention is to load a video with the page but by clicking a link, the original video will be updated and replaced with the corresponding video. For instance, if video1 loads with the page and the user clicks to view video2, the original div's innerHTML holding video1 is updated to play video2. Now, I have works great in IE and Chrome but nothing loads at all in Firefox. Below are some snippets of my code. Any idea how to load these videos in a manner that Firefox supports? Javascript Function function updateVideo(arraynum) { var arraynum; var vidId = document.anchors(arraynum).name; document.getElementById("movieDiv").innerHTML = "<object width='340' height='300'><param name='movie' value='http://www.youtube.com/v/" + vidId + "&h1=en&fs=1&color1=0x5d1719&color2=0xcd311b'></param><param name='wmode' value='opaque'></param><embed src='http://www.youtube.com/v/" + vidId + "&h1=en&fs=1&color1=0x5d1719&color2=0xcd311b' type='application/x-shockwave-flash' wmode='opaque' width='340' height='300'></embed></object>"; Html <div id = "movieDiv"> </div> Links <a name="-MQf_Ol00nk" href = "#" onclick="updateVideo(4)"><img src="../images/content/videos/kaleidoscope/2010/May/Arts-and-Events.jpg" border = "0"></a> Any help with this issue would be greatly appreciated. And on a smaller note, every time a link in clicked in IE, a '#' is added into the title bar. So clicking three or four videos would result in the page title being followed up with three or four # signs.

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• jQuery how to set click on href in the div?

  - by faya

  Good day, I want to set click event on every anchor element in my div container. Here is an example what I want to do: ---HTML--- <div id="my-container"> <a href="page1.html">page1</a> <a href="page2.html">page2</a> <a href="page3.html">page3</a> </div> ---- jQuery ---- $("#my-container a").click(function() { var link = $(this).attr("href"); $("#my-container").load(link); }); What I want to do is to let me handle loading event of href clicks and load it to the same container. And this is must done without id, class attributes which aren't available for that hrefs. The problem is in this: $("#my-container a"). Any help would be appreciated! Thanks UPDATE People doesn't seem to get right what I wanted to ask. I repeat myself again. $("#my-container a") <---- doesn't add click events on href anchors. So how I can set click event?

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• How can flash call jquery function in its event

  - by user2955639

  I want jquery to do something during some of the events when an audio is playing. So I'm coding a function like this <script> $.fn.playMedia = function(options){ var opts = $.extend({}, { swfSrc: '' timeUpdated: function(currentTime){}, startPlay: function(){}, endPlay: function(){} }, options); return $(this).each(function(){ // call flash to play the media whose src is opts.swfSrc // Is it possible that flash can call the js functions(opts.timeUpdate, opts.startPlay and opts.endPlay) at each time of the event is triggered? }); }}; </script> // Usage <div id="player"></div> <script> $('#player').playMedia({ swfSrc: '/path/song.mp3', timeUpdated: function(currentTime){ comsole.log(currentTime); } }); </script> I'm a totally layman of flash, I just guess this works. Hope someone could tell me how to make up a swf file for this jquery function. Or is there any existing jquery plugin which does this thing but can re-design apperance flexibly. Thank you very much!

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• Why does my simple event handling example not work?

  - by njreed

  I am trying to make a simple event handler. (Note, I'm not trying to implement a full-blown publish/subscribe model; I'm just interested in why my example doesn't work as I think it should) var myObj = (function () { var private = "X"; function triggerEvent(eventName) { if (this[eventName]) { this[eventName](); } } // Setter / Getter function getProp() { return private; } function setProp(value) { private = value; triggerEvent("onPropChange"); } // Public API return { // Events "onPropChange": null, // Fires when prop value is changed // Methods "getProp": getProp, "setProp": setProp }; })(); // Now set event handler myObj.onPropChange = function () { alert("You changed the property!"); }; myObj.setProp("Z"); // --> Nothing happens. Wrong // Why doesn't my alert show? I set the onPropChange property of my object to a simpler handler function but it is not being fired. I have debugged this and it seems that in triggerEvent the variable this is referencing the global window object. I thought it should reference myObj (which is what I need). Can someone explain the error in my thinking and how I correct this? Help much appreciated. jsFiddle here

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• Prevent event from parent element to child element in jquery

  - by sonam

  I have binded event as below: $(document).delegate('.budget', 'click', function(e){ if ($(this).hasClass('collapsed')) { $(this).removeClass('collapsed'); $(this).addClass('expanded'); } else if ($(this).hasClass('expanded')) { $(this).removeClass('expanded'); $(this).addClass('collapsed'); } }); Basically this toggles between expand and collapse. I have another event binded as below: $('[id^="tree"]').delegate('.collapsed', 'click', function(e){ var elementId = $(this).attr('id'); hideChildElement(elementId); }); The elements binded by the second event binding are parents of elements binded by first event binding. What happens is that on clicking on the element from the first binding event method also triggers the event binded by second event binding. I want to prevent any events from binding from second event binding to 1st event binding method. If element A is binded to click event from first event binding and B is binded to second event binding (A is inside B or A is child of B), I dont want any event of B to propagate to A. Note I tried e.stopImmediatePropagation(); but did not worked

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• Trigger alert when database entries are added, not when they are removed

  - by Jeremy

  I have a jQuery script running that makes a periodic AJAX call using the following code. var a = moment(); var dayOfMonth = a.format("MMM Do"); var timeSubmitted = a.format("h:mm a"); var count_cases = -1; var count_claimed = -1; setInterval(function(){ //check if new lead was added to the db $.ajax({ type : "POST", url : "inc/new_lead_alerts_process.php", dataType: 'json', cache: false, success : function(response){ $.getJSON("inc/new_lead_alerts_process.php", function(data) { if (count_cases != -1 && count_cases != data.count) { window.location = "new_lead_alerts.php?id="+data.id; } count_cases = data.count; }); } }); This is the PHP that runs with each call: $count = mysql_fetch_array(mysql_query("SELECT count(*) as count FROM leads")); $client_id = mysql_fetch_array(mysql_query("SELECT id, client_id FROM leads ORDER BY id DESC LIMIT 1")); echo json_encode(array("count" => $count['count'], "id" => $client_id['id'], "client_id" => $client_id['client_id'])); I need to change the code so that the alert only triggers when a new entry is added to the database, not when an existing entry is removed. As it stands, the alert fires on both events. Any help is greatly appreciated.

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• Detect if Download is Complete

  - by user604138

  I have a very simple and standard PHP force download script. How do I check if/when the download has completed in order to notify the user on the clientside? I don't even need to show the progress in real time, I am only interested in the very specific event: "when the download completes". Based on my research, it seems like it would have to be determined from the serverside as there is noondownloadready event and I don't think it is possible to intercept browser events. So it seems that my best bet would be to compare bytes sent to total bytes with some sort of clientside/severside interaction. How would I go about checking the bytes sent from the server for a PHP forced download? is there some sort of global PHP variable that store these data that I can ping with AJAX? <?php header("Content-Type: video/x-msvideo"); header("Content-Disposition: attachment; filename=\"".basename($realpath)."\";"); ... $chunksize = 1 * (1024 * 1024); // how many bytes per chunk if ($size > $chunksize) { $handle = fopen($realpath, 'rb'); $buffer = ''; while (!feof($handle)) { $buffer = fread($handle, $chunksize); echo $buffer; ob_flush(); flush(); } fclose($handle); } else { readfile($realpath); } exit(); ?> The reason I need this: For the project I am working on, it is required that after the download starts, the page redirects to (or displays) a "please wait while the download completes" page. Then, once it is complete, it should redirect to (or display) a "Your download is complete, thank you" page. I am open to other ideas that would achieve the same result.

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• multiple touches: touchend event fired only when a touchmove occurs

  - by dridri

  I would like to add some multitouch features to my javascript application when it is accessed from an ios device (and maybe android later). I want to provide a shiftkey-like functionality: the user may hold a button on the screen with one finger, and while this button is pressed, the behavior for a tap action on the rest of the screen is slightly different from the classic tap. The problem i'm running into is that i do not receive any touchend event for the tapping finger unless a touchmove is fired for the first finger holding the shiftkey button. Because the screen is very sensitive, touchmove events gets easily fired and in most cases everything works fine. But when the user's finger is a bit too still, the tapping is not detected until the user moves his finger a bit. This induces a variable 'delay' between the tapping and the action that occurs on the screen (the delay may vary and last a few seconds if the user is very calm). My guess is that this delay will cause the user to tap again and thus fire the action a second time, which is something that i don't want ! You can test it here with your ipad/iphone : http://jsfiddle.net/jdeXH/8/ Try to make the body remain green for a few seconds by holding your finger very still on the cyan div while tapping on the red div. Is this behavior to be expected ? Is there some known workaround for the problem ? I would have expected the touchend event to be fired right away when the finger is removed from the screen. i tested this with iOS 5.1.1 (ipad1 and iphone4s) edit: found a similar question Multitouch touchEvents not triggered as they should on Safari Mobile

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