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  • Why doesn't Javascript recognize the HTML class attribute?

    - by Cornflake
    Can anyone help me with a Javascript question, please? Why does the following code display only message boxes with the word "null" in them? And I think there are not enough of them either. <html> <head> <script type="text/javascript"> function showElementClasses(node) { var els = node.getElementsByTagName("*"); for(var i=0,j=els.length; i<j; i++) alert(els[i].getAttribute("class")); alert("Class: " + els[i].className); } showElementClasses(document); </script> </head> <body class="bla"> <div class="myclass" style="width: 500; height: 400" id="map"></div> </body> </html>

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  • how do I call a javacript function every 60 seconds?

    - by William
    So I'm trying to work on a Canvas demo, and I want this square to move from one side to the other, but I can't figure out how to call javascript in a way that repeats every 60 seconds. Here's what I got so far: <!DOCTYPE html> <html lang="en"> <head> <title>Canvas test</title> <meta charset="utf-8" /> <link href="/bms/style.css" rel="stylesheet" /> <style> body { text-align: center; background-color: #000000;} canvas{ background-color: #ffffff;} </style> <script type="text/javascript"> var x = 50; var y = 250; function update(){ draw(); x = x + 5; } function draw(){ var canvas = document.getElementById('screen1'); if (canvas.getContext){ var ctx = canvas.getContext('2d'); ctx.fillStyle = 'rgb(236,138,68)'; ctx.fillRect(x,y,24,24); } } </script> </head> <body onLoad="setTimeout(update(), 0);"> <canvas id="screen1" width="500" height="500"></canvas> </body> </html>

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  • macro collapse all in solution visual studio 2010

    - by rod
    Hi All, I found the CollapseAll macro online that has worked for me in vs2005 and vs2008. However, this half way works in vs2010. It looks like it only collapses the top nodes and not any subnodes that may be expanded? any ideas? Thanks, rod. Sub CollapseAll() ' Get the the Solution Explorer tree Dim UIHSolutionExplorer As UIHierarchy UIHSolutionExplorer = DTE.Windows.Item(Constants.vsext_wk_SProjectWindow).Object() ' Check if there is any open solution If (UIHSolutionExplorer.UIHierarchyItems.Count = 0) Then ' MsgBox("Nothing to collapse. You must have an open solution.") Return End If ' Get the top node (the name of the solution) Dim UIHSolutionRootNode As UIHierarchyItem UIHSolutionRootNode = UIHSolutionExplorer.UIHierarchyItems.Item(1) UIHSolutionRootNode.DTE.SuppressUI = True ' Collapse each project node Dim UIHItem As UIHierarchyItem For Each UIHItem In UIHSolutionRootNode.UIHierarchyItems 'UIHItem.UIHierarchyItems.Expanded = False If UIHItem.UIHierarchyItems.Expanded Then Collapse(UIHItem) End If Next ' Select the solution node, or else when you click ' on the solution window ' scrollbar, it will synchronize the open document ' with the tree and pop ' out the corresponding node which is probably not what you want. UIHSolutionRootNode.Select(vsUISelectionType.vsUISelectionTypeSelect) UIHSolutionRootNode.DTE.SuppressUI = False End Sub Private Sub Collapse(ByVal item As UIHierarchyItem) For Each eitem As UIHierarchyItem In item.UIHierarchyItems If eitem.UIHierarchyItems.Expanded AndAlso eitem.UIHierarchyItems.Count > 0 Then Collapse(eitem) End If Next item.UIHierarchyItems.Expanded = False End Sub End Module

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  • calling java script function then C# function after clicking ASP.NET button

    - by Eyla
    I have this serious: I have ASP.NET page, This page contents Update panel with ASP.NET control. I have Java script function to do validation so when I click the button I will use onclientclick to call the java function to do the validation and after this one done should call then event click button function from code behind. I tried vew methods but they did not work for me. here is sample of my code that after I click the button onclientclick will call the java script function for validation and if the validation is OK should call onclick event. .................... java script function ........................ <script type="text/javascript" > function add(){ if (tag == trye) { document.getElementById('<%=btnInfor.ClientID%>').click(); alert("DataAdded") } else { alert("Requiered Field Missing.") return false; } } </script> ..................... ASP.NET button ................... <asp:Button ID="btnInfor" runat="server" Text="Add Information" Style="position: absolute; top: 1659px; left: 433px;" onclientclick="JavaScript: return myAdd()" /> .................... code behind in C# ...................... protected void btnInfor_Click(object sender, EventArgs e) { \\mycode }

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  • How to do drag-n-drop and resize on an image using jQuery?

    - by Scott
    How do I resize and image using jQuery but keep its aspect ratio the same? <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <title>CrossSlide - A jQuery plugin to create pan and cross-fade animations</title> <link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css" rel="stylesheet" type="text/css"/> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script> <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script> </head> <body> <style type="text/css"> #resizebleImage { background: silver; } </style> <script type="text/javascript"> $(document).ready(function(){ $("#resizebleImage").resizable().parent().draggable(); }); </script> <img id="resizebleImage" src="http://images.askmen.com/galleries/singer/gloria-estefan/pictures/gloria-estefan-picture-4.jpg"> </body> </html>

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  • Execute javascript in PHP

    - by Andreas Bonini
    I'm generating your typical Web 2.0 HTML page with PHP: it contains a lot of <script> tags and javascript code that will substantially change the DOM after the load event. Is there a way to get the final HTML code directly from PHP, without opening the page with any browser? For example, let's say the HTML for the page is (it's just an example): <html> <head> <script>...the jquery library code...</script> <script>$(document).ready(function() { $("body").append("<p>Hi!</p>");</script> </head> <body> </body> </html> This HTML is saved in the $html PHP variable. Now, I want to pass that variable to some function that will return $result = <html>....<body><p>Hi!</p></body></html>. Is this possible?

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  • How to use the textbox value to fetch the records and to display it in the same page

    - by Aruna
    Hi, i am having a Form like <script language="javascript" type="text/javascript"> function formfn() { var str = document.getElementById('TitleSearch').value; alert(str);//displays the keyword like database } </script> <form name="f1" method="post"> <p><label for="TitleSearch">Keywords:</label> <input title="Keyword" size="40" value="" id="TitleSearch"></p> <p> <input type="submit" id="im-search" value="Search" name="im-search" onClick="formfn();"></p> </form> I am having a page where in the top i have this form on search it has to take the value of the textbox TitleSearch and to use this to retrieve the records matching by <?php $db =& JFactory::getDBO(); $query = 'SELECT * from #__chronoforms_Publications where keyword like "%valueretrieved%" '; $db->setQuery($query); $rows = $db->loadObjectList(); //echo $rows; ?> Once the search button is clicked the text box value of the keyword is retrieved . I am trying to use this value in the select query to fetch the records and to display in the same page.. How to do so..

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  • Syntax for documenting JSON structure

    - by Roman A. Taycher
    So I'm trying to document the format of the json returned by an api I am writing against and I'd like to know if there is any popular format for the documentation of json structure. Note I'm not trying to to test or validate anything, I'm just using this for documentation. Also some ways to add comments to non-constants(items always returned w/ the same value) would be nice. This the not totally thought out scheme I'm currently using: Plain names refer to identifiers or types. Some types have type-comment Strings that appear to be constant(always returned for that type of request) strings are "str" Constant Numbers would be just the number Constant null is null Booleans are true/false for constant booleans or Boolean otherwise [a,b,c] are lists with 3 items a,b,c [... ...] is a list of repeating elements of some types/constants/patterns {a:A,b:B,c:c} and {... ...} is the same for a dictionary. example: story := [header,footer] header := {"data":realHeader,"kind":"Listing"} realHeader := {"after": null, "before": null, "children": [{"data": realRealHeader, "kind": "t3"}], "modhash": ""} footer := {"data":AlmostComments,"kind":"Listing"} AlmostComments := {"data": {"after": null, "before": null, "children": comments, "modhash": ""}, "kind": "t1"} comments := [...{"data":comment, "kind":"t1"}...] realRealHeader := {"author": string, "clicked": boolean, "created": int, "created_utc": int, "domain": "code.reddit.com", "downs": int, "hidden": boolean, "id": string-id, "is_self": boolean, "levenshtein": null, "likes": null, "media": null, "media_embed": { }, "name": string-id, "num_comments": int, "over_18": false, "permalink": string-urlLinkToStoryStartingFrom/r, "saved": false, "score": int, "selftext": string, "selftext_html": string-html, "subreddit": string-subredditname, "subreddit_id": string-id, "thumbnail": "", "title": string, "ups": int, "url": "http://code.reddit.com/" } comments := { "author": string, "body": string-body_html-wout-html, "body_html": string-html-formated, "created": int, "created_utc": int, "downs": int, "id": string-id, "levenshtein": null, "likes": null, "link_id": string-id, "name": string-id", "parent_id": string-id, "replies": AlmostComments or null, "subreddit": string-subredditname, "subreddit_id": string-id, "ups": int }

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  • Passing jquery JSON from Codeigniter controller to view

    - by dede
    I've been struggling to make it work, but cannot pass the inserted data from the controler to the view in CI using JSON. The input value from the form is successfully inserted into the database, but cannot make it appear in the view. This is my view file ajax_view.php: <script type="text/javascript" src="<?php echo base_url(); ?>js/jquery-1.4.2.min.js"></script> $(document).ready(function(){ $("#submit").click(function(){ var inp = $('#inp').val(); $.post("ajax/ajax_input", { 'send' : inp }, function(data){ alert(data.input_text); }, "json"); }); }); </script> </head> <body> <form id="form1" method="post" action=""> <label for="inp">Text</label> <input type="text" name="inp" id="inp" /> <label for="submit"></label> <input type="submit" name="submit" id="submit" value="Submit" /> And this is the ajax_input method of the ajax.php controller: <?php // Initializing controller ..... // ............................. //ajax method function ajax_input(){ $var_1 = trim($this->input->post('send')); $array = array('input_text' => $var_1); echo json_encode($array); $this->db->insert('ajax',$array); } Trying to debug it with Firebug, it gives me that data.input_text is empty. What am I doing wrong? EDIT: I'm using XAMPP on Win, so is it posible that json configuration is the problem?

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  • add dynamic field near his parent field?

    - by Kaps Hasija
    hi in my web page i am using Add Dynamic Field Functionality by using jquery. I am adding new div bu clicking on Existing div Like <div class="divA">divA1 </div> <div class="divB" >DivB1 </div> <div class="divC" />DivC1 </div> by clicking on parent div i am creating new daynamic div <div class="divA">DivA2 </div> its coming end of the all div's like that <div class="divA">divA1 </div> <div class="divB" >DivB1 </div> <div class="divC" />DivC1 </div> <div class="divA">DivA2 </div> But i need along with his parent div Like that <div class="divA">divA1 </div> <div class="divA">DivA2 </div> <div class="divB" >DivB1 </div> <div class="divC" />DivC1 </div> any idea Thanks. This is My Jquery Code newTextBoxDiv = $(document.createElement('div')) .attr("id", text).attr("class", 'test0 ' + text); newTextBoxDiv.html('<div style=" width:150px; class="DivA" float: left"> </div>'); } newTextBoxDiv.appendTo("#contents"); contents is id of main div

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  • JQuery fadeIn fadeOut loop issue

    - by Tarun
    I am trying to create a jQuery fadeIn fadeout effect for my page content using the code below. $(document).ready(function (){ $("#main").click(function(){ $("#content").fadeOut(800, function(){ $("#content").load("main.html", function(){ $("#content").fadeIn(800); }); }); }); $("#gallery").click(function(){ $("#content").fadeOut(800, function(){ $("#content").load("gallery.html", function(){ $("#content").fadeIn(800); }); }); }); }); So whenever a user clicks on either the main link or gallery link, the old content fades out and new content fades in. The problem I am facing is that for every link I have to repeat the same code again and again. So I tried to use a loop to simplify this but it doesn't work. Here is my code: var p = ["#main","#gallery", "#contact"]; var q = ["main.html", "gallery.html", "contact.html"]; for (i=0;i<=(p.length-1);i++){ $(p[i]).click(function(){ $("#content").fadeOut(500, function(){ $("#content").load(q[i], function(){ $("#content").fadeIn(500); }); }); }); } It works fine when I write repeat the scripts for each link but it doesn't work when I combine them in a loop. I only get the FadeOut effect and nothing happens after that. This might be a very simple issue or may be something deep into jQuery. Any hint or help is greatly appreciated. TK

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  • Returning an integer from a select box - JavaScript

    - by Ross
    Very simply, I want to be able to access the year from the select box as an integer. In my test, my alertbox is telling me the value is undefined. <form name="form1" method="post" action=""> <label>birth year <select name="birth year" id="dueYear"> <OPTION VALUE='' SELECTED>--Year--</OPTION> <OPTION VALUE='2011'>2011</OPTION> <OPTION VALUE='2010'>2010</OPTION> <OPTION VALUE='2009'>2009</OPTION></SELECT> </select> </label> </form> <script type="text/javascript"> var dueDateYear = parseInt(document.getElementById("dueYear")); </script> <button onclick="alert(dueDateYear)">Click Me!</button> All I want it to do, is tell me the year I have selected -- any help would be appreciated, I am a newbie :(

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  • ASP.net MVC Routing on Postback

    - by Mark Kadlec
    In my ASP.net MVC View I have a dropdown that I want to get details on selection and asynchronously update a div. My aspx is as follows: <% using (Html.BeginForm("Index", "Portal", FormMethod.Post, new { id = "TheForm" })) {%> <h2>Index</h2> <% using (Ajax.BeginForm("Details", new AjaxOptions { UpdateTargetId = "mpkResults" })) { %> <%=Html.DropDownList("Docs", (IEnumerable<SelectListItem>)ViewData["Docs"], new { onchange = "document.getElementById('TheForm').submit();" })%> <p><input type="submit" value="Details" /></p> <% } %> <div id="mpkResults" style="margin:10px 0px 0px 0px;"></div> ... The onchange event fires correctly on selection of the dropdown, but instead of the Details method in my code behind firing, it hits my Index method. Why is the details method not getting hit on the onchange event? My Details() method in the controller is: public ActionResult Details() { ... < It never gets here, just goes to the index() method } It's a little frustrating right now since I'm sure it is a simple mistake but not sure what it could be. I looked at the Source of my page and sure enough, the form looks like it should be routing to the Details Action: <form action="/Portal/Details" method="post" ... Any help would be appreciated.

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  • PHP: Making my code simpler/shorter welcome message

    - by Karem
    Any suggestion to make this welcome message shorter: <?php if(isset($_SESSION['user_id'])) { if(isSet($_SESSION['1stTime'])){ ?> <strong id="welcome" style="font-size: 10px;"> <a href="logout.php"> Logga ut </a> </strong> <?php }else{ $_SESSION['1stTime'] = time(); ?> <script> $(document).ready(function() { $("#welcome").fadeIn("slow"); setTimeout(function(){ $("#welcome").fadeOut("slow"); setTimeout(function(){ $("#welcome").html("<a href='logout.php'>Logga ut</a>"); $("#welcome").fadeIn(); }, 800); }, 5000); }); </script> <strong id="welcome" style="display: none; color: #FFF; font-size: 10px;">Hej, <?php echo $FULL; ?>!</strong> <?php } } ?> First it checks if you are signed in. Next if 1stTime is set, if it is then show "Log out" in swedish, if it isnt, then introduce with "Hi, NAME", and then change to "Log out" after 5 seconds(jquery) + set the session How can i make this simpler?

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  • Can't get jQuery to wokr with Prototype - tried everything....

    - by thinkfuture
    Ok so here is the situation. Been pulling my hair out on this one. I'm a noob at this. Only been using rails for about 6 weeks. I'm using the standard setup package, and my code leverages prototype helpers heavily. Like I said, noob ;) So I'm trying to put in some jQuery effects, like PrettyPhoto. But what happens is that when the page is first loaded, PrettyPhoto works great. However, once someone uses a Prototype helper, like a link created with link_to_remote, Prettyphoto stops working. I've tried jRails, all of the fixes proposed on the JQuery site to stop conflicts... http://docs.jquery.com/Using_jQuery_with_Other_Libraries ...even done some crazy things likes renaming all of the $ in prototype.js to $$$ to no avail. Either the prototype helpers break, or jQuery breaks. Seems nothing I do can get these to work together. Any ideas? Here is part of my application.html.erb <%= javascript_include_tag 'application' %> <%= javascript_include_tag 'tooltip' %> <%= javascript_include_tag 'jquery' %> <%= javascript_include_tag 'jquery-ui' %> <%= javascript_include_tag "jquery.prettyPhoto" %> <%= javascript_include_tag 'prototype' %> <%= javascript_include_tag 'scriptalicious' %> </head> <body> <script type="text/javascript" charset="utf-8"> jQuery(document).ready( function() { jQuery("a[rel^='prettyPhoto']").prettyPhoto(); }); </script> If I put prototype before jquery, the prototype helpers don't work If I put the noconflict clause in, neither works. Thanks in advance! Chris

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  • How do I use a jQuery not selector to select relative URLs?

    - by Matt
    I'm working on a little jQuery script to add Google Analytics pageTracker onclick data to all relative URLs on my forum, allowing me to track clicks to external sites. I don't want to add the onclick to internal links on forum.sitename or sitename, and I don't want to add them to any hrefs marked # or that start with /. My script below works nicely, but for one minor problem! All of the forum's URLs are relative and don't start with /. I appear to have no way to change that, so need to modify the jQuery below to prevent it adding the onclick to links like as it currently does. What I want to do, is to write a .not() function like .not("[href!^=http") to prevent jQuery from adding the onclick to any hrefs which do not start with http. However, .not() appears not to support this. I'm new to jQuery and can't figure this out. Any pointers would be massively appreciated. $(document).ready(function(){ // Get URL from a href var URL = $("a").attr('href'); // Add pageTracker data for GA tracking $("a") .not("[href^=#]") .not("[href^=http://forum.sitename]") .not("[href^=http://www.sitename]") .attr("onclick","pageTracker._trackEvent('Outgoing_Links', 'Forum', " + URL + ");") ; }); Thanks!

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  • curl post picture multipart/form-data, php cURL need help!

    - by user331071
    I'm trying to upload a picture to a specific website using php cURL but I don't really understand what parameters do I need to send because the data looks a bit weird . Here is what i got with the http analyzer Type : multipart/form-data; boundary=---------------------------182983931283 -----------------------------182983931283 Content-Disposition: form-data; name="file"; filename="Blue hills.jpg" Content-Type: image/jpeg Here appears the souce of the image itself like "ÿØÿàÿØÿàÿØÿàÿØÿàÿØÿàÿØÿà" -----------------------------182983931283 Content-Disposition: form-data; name="action" images -----------------------------182983931283 Content-Disposition: form-data; name="anonymous_email" Y -----------------------------182983931283 Content-Disposition: form-data; name="site_id" 1 -----------------------------182983931283 and so on other parameters. The issue that I have is that I don't understand what is the boundary, where do I get it from (because it doesn't appear in the html document that generates the POST and how should I make the post . If you would give me a simple example to post the above parameters to http://example.com I will definitely get the trick . Currently I'm using the following function to make the post : function processPicturesPage($title, $price, $numbedrooms, $description) { //Set the login parameters and initiate the Login process $fields = array( "changedImages" = "", "site_id" = "1", "posting_id" = "", "current_live_date" = "", "images_loaded" = "", "image_actions" = "", "title" = $title, ); foreach($fields as $key=$value) { $fields_string .= $key.'='.$value.'&'; } rtrim($fields_string,'&'); $URL = "http://www.example.com/cgi-bin/add_posting.pl"; return $this-processCurlrequest($URL, count($fields), $fields_string); } and in the processCurlrequest I have the curl options (cookies etc) and url .

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  • Select ID in table ...

    - by Kris-I
    Hello, I have this code <% foreach (var item in Model.List) { %> <tr> <td><%: item.LastName %></td> <td><%: item.FirstName %></td> <td><%: item.IsEnable %></td> <td><a href="#" class="CustomerEdit">Edit</a></td> <td><a href="#" class="CustomerDetail">Detail</a></td> <td><a href="#" class="CustomerDelete">Delete</a></td> </tr> <% } %> <script language="javascript" type="text/javascript"> $(document).ready(function () { $(".CustomerEdit").click(function () { alert("blabla"); //need id here }); }); </script> It's not in the code but I have an "Item.Id", it's not place anywhere because I don't know where place it ;-). I'd like when I click on the "Edit" hyperlink get the id (item.Id) of the current line. Any idea ? Thanks,

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  • Capture and handling the tab/Textchanged event in a textbox in asp.net MVC

    - by Icerman
    I have the following code th handle a user name validation on the server side. But the event seems not firing since break points in js or C# code didn't hit. Can anyone point out where I did wrong? Here is the user control which has a user name textbox: <%: Html.TextBox("UserName", Model.Username, new { maxlength = "40", size = "20", tabindex = "1", @onchange = "CheckAvailability()" })% CheckAvailability() is defined in the User.Validation.js and included in the above user control: $(document).ready(function () { function CheckAvailability() { $.post("/Home/Survey/CheckAvailability", { Username: $("#UserName").val() }, function (data) { var myObject = eval('(' + data + ')'); var newid = myObject; if (newid == 0) { $("#usernamelookupresult").html("<font color='green'>Available :-D</font>") } else { $("#usernamelookupresult").html("<font color='red'>Taken :-(</font>") } }); } }); Here is the survey controller function which will have server side validation: [HttpPost] public ActionResult CheckAvailability(string Username) { int Taken = 0; // This is where you add your database lookup if (Username == "abc") { Taken = 1; } return Json(Taken); }

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  • How can I format Custom Data and display in autocomplete when source is an DB

    - by Andres Scarpone
    so I'm trying to get some info in the auto-complete widget like it's shown in the JQuery UI demo Demo, the only problem is they use a variable that they fill with the data they want to show, I instead want to access the data and the different description and stuff using a Data Base in MySQL, for this I have changed the source to use another php page that looks up the info. here is the code for the Auto-complete, I really don't understand the methods so I haven't changed it from the basic search. This is the JS: $(document).ready((function(){ $( "#completa" ).autocomplete({ source: "buscar.php", minLength: 1, focus: function (event, ui){ $("#completa").val(ui.item.val); return false; }; })); This is what I have in buscar.php: <?php $conec = mysql_connect(localhost, root, admin); if(!$conec) { die(mysql_error()); } else { $bd = mysql_select_db("ve_test",$conec ); if(!$bd) { die(mysql_error()); } } $termino = trim(strip_tags($_GET['term']));//Obtener el termino que envia el autocompletar $qstring = "SELECT name, descripcion FROM VE_table WHERE name LIKE '%".$termino."%'"; $result = mysql_query($qstring);//Solicitud a la Base de Datos while ($row = mysql_fetch_array($result,MYSQL_ASSOC))//Realizar un LOOP sobre los valores obtenidos { $row['value']=htmlentities(stripslashes($row['name'])); $row_set[] = $row;//build an array } echo json_encode($row_set);//Enviar los datos al autocompletar en codificacion JSON, Altamente Necesario. ?

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  • Why aren't these Canvases rendering?

    - by bpapa
    I'm creating a web app that allows users to enter a number of colors, by specifying RGB values. Upon submission, the user will see a canvas with a solid rectangle drawn in the color chosen. On this page, I have 7 canvases. The first one draws just fine, but none of the rest show up. The browser is Safari. Here's the relevant code: First, the script element in the header, which defines the function I use to draw to the canvas. <script language="JavaScript" TYPE="text/javascript"><!-- function drawCanvas(canvasId, red, green, blue) { var theCanvas = document.getElementById("canvas" + canvasId); var context = theCanvas.getContext("2d"); context.clearRect(0,0,100,100); context.setFillColor(red,green,blue,1.0); context.fillRect(0,0,100,100); } // --> </script> Next, the HTML source, where I have my canvas tags and some embedded Javascript to call my drawCanvas function <canvas id="canvas0" width="100" height="100"> </canvas> <script language="JavaScript" TYPE="text/javascript"><!-- drawCanvas(0,250,0,0); // --> </script> . . //more source . <canvas id="canvas1" width="100" height="100"> </canvas> <script language="JavaScript" TYPE="text/javascript"><!-- drawCanvas(1,4,250,6); // --> </script> Also provided is a screenshot. As you can see, the "red" canvas comes up just fine, but the second one, which should be green, doesn't show up at all. Any ideas?

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  • Event type property lost in IE-8

    - by Channel72
    I've noticed a strange Javascript error which only seems to happen on Internet Explorer 8. Basically, on IE-8 if you have an event handler function which captures the event object in a closure, the event "type" property seems to become invalidated from within the closure. Here's a simple code snippet which reproduces the error: <html> <head> <script type = "text/javascript"> function handleClickEvent(ev) { ev = (ev || window.event); alert(ev.type); window.setTimeout(function() { alert(ev.type); // Causes error on IE-8 }, 20); } function foo() { var query = document.getElementById("query"); query.onclick = handleClickEvent; } </script> </head> <body> <input id = "query" type = "submit"> <script type = "text/javascript"> foo(); </script> </body> </html> So basically, what happens here is that within the handleClickEvent function, we have the event object ev. We call alert(ev.type) and we see the event type is "click". So far, so good. But then when we capture the event object in a closure, and then call alert(ev.type) again from within the closure, now all of a sudden Internet Explorer 8 errors, saying "Member not found" because of the expression ev.type. It seems as though the type property of the event object is mysteriously gone after we capture the event object in a closure. I tested this code snippet on Firefox, Safari and Chrome, and none of them report an error condition. But in IE-8, the event object seems to become somehow invalidated after it's captured in the closure. Question: Why is this happening in IE-8, and is there any workaround?

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  • Making a Javascript game, Having a little problem with scrolling.

    - by RobertWHurst
    I have a #wrapper div and a #grid div nested inside. currently I can scroll around with this function below. getCursorPos : function(){ // set the empty cursor object var cursor = {}; //get the offset from the left of the grid container var grid //offset loop $(function getCursorPos(){ grid = $('#grid').offset(); setTimeout(getCursorPos, game.loopSpeed); }); //continuosly get the position var that = this; $(document).mousemove(function(e){ //if game mode is menu exit if(game.mode === 'menu'){ return; } // NOTE: this looks a litle over done but don't remove anything // its like this because javascript uses floating points // and so in order to line up to the nearest hunderedth I // had to make the cursor and div position intergers by // muliplying by ten. one the two are added I reduced them // and rounded them. that.x = Math.round(((e.pageX * 10) - (grid.left * 10)) / 10); that.y = Math.round(((e.pageY * 10) - (grid.top * 10)) / 10); }); }, the problem is that the mouse coordinates only update when the mouse moves. is there any way to get the coordinates with out moving the mouse?

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  • jQuery - Unchecking checkboxes that act like radio buttons

    - by Cecil
    Hey All, I have the following jQuery code to make my checkboxes act like radio buttons, so that only 1 of the 3 can be checked at a time. <script type="text/javascript" language="javascript"> $(document).ready(function() { $("#testing input:checkbox").change(function(){ var checkname = $(this).attr("name"); $("input:checkbox[name='" + checkname + "']").removeAttr("checked"); this.checked = true; }); }); </script> The checkboxes are layed out like the following: <input type="checkbox" id="testing" name="testing" value="B"> <input type="checkbox" id="testing" name="testing" value="I"> <input type="checkbox" id="testing" name="testing" value="A"> This works exactly how i want it to work, not a problem, except once i click one of the 3, i cant unclick it so that none of them are checked, this is what i want to happen, so along with being only able to click one at a time, im able to uncheck them completely. Any help would be grand :)

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  • Google Charts - Adding Tooltip to Colorized Column Chart

    - by David K
    I created a column chart with google charts that has a different color assigned to each column using the following posting: Assign different color to each bar in a google chart But now I'm trying to figure out how to customize the tooltips for each column to also include the number of users in addition to the percent, so "raw_data[i][1]" I would like it to look like "70% (80 Users)" I understand that there is "data.addColumn({type:'number',role:'tooltip'});" but I'm having trouble understanding how to implement it for this use-case. function drawAccountsChart() { var data = new google.visualization.DataTable(); var raw_data = [ ['Parents', 80, 160], ['Students', 94, 128], ['Teachers', 78, 90], ['Admins', 68, 120], ['Staff', 97, 111] ]; data.addColumn('string', 'Columns'); for (var i = 0; i < raw_data.length; ++i) { data.addColumn('number', raw_data[i][0]); } data.addRows(1); for (var i = 0; i < raw_data.length; ++i) { data.setValue(0, i+1, raw_data[i][1]/raw_data[i][2]*100); } var options = { height:220, chartArea: { left:30, width: "70%", height: "70%" }, backgroundColor: { fill:"transparent" }, tooltop:{ textStyle: {fontSize: "12px",}}, vAxis: {minValue: 0} }; var formatter = new google.visualization.NumberFormat({ suffix: '%', fractionDigits: 1 }); formatter.format(data, 1); formatter.format(data, 2); formatter.format(data, 3); formatter.format(data, 4); formatter.format(data, 5); var chart = new google.visualization.ColumnChart(document.getElementById('emailAccountsChart')); chart.draw(data, options); }

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