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  • It's possible to don't pass in GET some fields of a form?

    - by avastreg
    I have a form with some input texts passed in GET, and i don't want to have in GET all the fields; i want to avoid empty fields. So, a concrete example for: <form method="GET" action="an_url"> <input type="text" name="field1"/> <input type="text" name="field2"/> <input type="text" name="field3"/> <input type="submit" value="submit"/> </form> I supposed that fields disabled by html attribute "disabled" shouldn't be passed to GET. So i have done a js (based on jquery) to disable empty fields on submit, something like this: $("form").submit(function() { $(this).find("input[type=text]").each( function () { if (!$.trim($(this).val())) { $(this).attr("disabled", "true"); } }); }); However, this doesn't work. Any ideas?

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  • Test whether image loaded correctly with JavaScript

    - by johkar
    I have an image deployed on several application servers (green up arrow: uparrow.gif). I have an application server status page where I list out all the servers and with a corresponding image where the image's source is the uparrow.gif for that server. If the image does not load (server down) I would like to switch to a red down arrow (downarrow.gif). Is there a way to check whether an image loaded or not with straight JavaScript (no JS libraries etc)? I would imagine I would set an interval for it to continue checking if the user were on the page. Thanks.

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  • JavaScript data formatting/pretty printer

    - by Dan
    I'm trying to find a way to 'pretty print' a JavaScript data structure in a human-readable form for debugging. I have a rather big and complicated data structure being stored in JS and I need to write some code to manipulate it. In order to work out what I'm doing and where I'm going wrong, what I really need is to be able to see the data structure in its entirety, and update it whenever I make changes through the UI. All of this stuff I can handle myself, apart from finding a nice way to dump a JavaScript data structure to a human-readable string. JSON would do, but it really needs to be nicely formatted and indented. I'd usually use Firebug's excellent DOM dumping stuff for this, but I really need to be able to see the entire structure at once, which doesn't seem to be possible in Firebug. Any suggestions welcome, thanks in advance.

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  • When is JavaScript's eval() not evil?

    - by Richard Turner
    I'm writing some JavaScript to parse user-entered functions (for spreadsheet-like functionality). Having parsed the formula I could convert it into JavaScript and run eval() on it to yield the result. However, I've always shied away from using eval() if I can avoid it because it's evil (and, rightly or wrongly, I've always thought it is even more evil in JavaScript because the code to be evaluated might be changed by the user). Obviously one has to use eval() to parse JSON (I presume that JS libraries use eval() for this somewhere, even if they run the JSON through a regex check first), but when else, other than when manipulating JSON, it is OK to use eval()?

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  • Using argument (this) passed via element eventhandler

    - by Kel
    Hey guys, I want to use the argument I pass (this) in a JS function and treat it as an jQuery variable. Example: <script> function useMe(obj){ $(obj).val(); ... ... ... } </script> <select id="selectid" onChange="useMe(this)"> <option>......</option> </select> Is there a possibility to treat the passed argument as a jQuery element? Btw. I need to do it this way, because the select-element isn't created on load. The select element will be created later asynchronously. So, this won't work: $("select").each(function (i){ var select_id = $(this).attr("id"); $(this).change(function(e){ because it doesn't exist yet. Thanks for your help.

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  • Which one should I choose AMQP or XMPP for real-time browser-based game?

    - by Devyn
    Hi, I'm choosing between AMQP (RabbitMQ) vs XMPP (eJabberd) for my browser-based flash-free javascript powered real-time turn-based game. I don't know much about AMQP and XMPP protocol. I would like to use PHP for user-authorization and some data store-retrieve with MySQL. As far as I found out, RabbitMQ has PHP clients but eJabberd not. What I understood is javascript client calls PHP script and manipulate necessary processing and then pass to AMQP or XMPP server to pass the data to opponent player. There is a good book 'Pro XMPP Programming with JS and jQuery' from Wrox but there is no example with PHP. So following are my questions. 1) Which protocol is suit for my game? 2) Shall I choose RabbitMQ just for it's PHP client support?

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  • Web Page Opinions and Suggestions

    - by MrEnder
    Been working my * off on this for a few days trying to keep updating it to make it most efficient with everything I learn... I'm quite proud of it so far considering I'm not actually the best coder lol most JS and PHP confuses the crap outa me unless I do it from scratch. So anyways here is the link. Tell me what you think. Suggestions would be amazing. I'd love to know what I screwed up as long as you explain in detail as to why and how to fix it. I really hate when people hand me a huge snippet and expect me to understand it -_- Thanks Shelby LINK http://opentech.durhamcollege.ca/~in...rittains/labs/

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  • In an ASP.NET Web Site Project, what is the best option to manage modular widgets

    - by Juan Sagasti
    We are creating a modular Web Site Project and all the UI is based on simple html pages with javascript widgets. These widgets obtain the data from a WCF class located in the app_code folder. Each widget has 3 files [ js, css , cs] and an image directory: , and we want all these files to be located under the same directory, say: /widgets/mywidget/ The problem is that the .cs file needs to be in the app_code folder to be compiled dynamically and that would break our widget modularity forcing the installator to distribute the widget code in two places. One of the options is use compiled assemblies instead of .cs files and use Assembly.Load() or smthg similar to load them when needed. What other options do you see?

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  • Javascript: Simply change items in another select box?

    - by oni-kun
    I'm developing a registration page and wish to use JS to dynamically choose avatar selection based on gender. Here's what I have so far.. <select name="gender"> <option value="Male">Male </option> <option value="Female">Female </option> </select> And that should update options in this based on gender: <select name="avatar"> <option value="Trainer">Trainer </option> </select> <br /> <img src="images/trainers/male/Trainer.gif" /> I can't wrap my head around example code or concepts, I just need an example of how to fill 2-3 values into the 'avatar' selectbox based on gender, female or male, also how can I make 'Trainer' part of 'Trainer.gif' become dynamic? based on the avatar they choose?

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  • Django: tinyMCE and cross site javascript

    - by pistacchio
    Hi, follow this question, I was able to set some textareas in my admin page as richtext inputs. The most voted answer suggests to follow an example and is what i did. Also, it talks about a problem concerning "blank pages". I'm having the same problem and I'm not able to solve it. I have my media files served by a different server, so MEDIA_URL points to a different host with a different port. To simulate this in my dev environment, I also serve media files from a different port. Debugging the failing javascript, Chrome yelds: Unsafe JavaScript attempt to access frame with URL http://localhost:8000/admin/blog/post/add/ from frame with URL http://localhost:88/s3mangerie/js/tiny_mce/themes/advanced/image.htm. Domains, protocols and ports must match. How to solve this problem? Thanks

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  • Can't print elements in a DIV tag

    - by Mckenzi
    I am using a Drag-able and re-sizeable DIV's in this HTML file. Where the user will place the DIV tag to his desired place in a main parent DIV tag. Now I want to print this main DIV tag, but the problem is that the code which I'm using to PRINT this main DIV is printing in a sequence, like not the way user has arranged the DIV's. Also it doesn't take up the main DIV background IMAGE. here is the code. JAVASCRIPT & CSS <link rel="stylesheet" type="text/css" href="byrei-dyndiv_0.5.css"> <script type="text/javascript" src="http://jqueryjs.googlecode.com/files/jquery-1.3.1.min.js" > </script> <script type="text/javascript" src="byrei-dyndiv_1.0rc1.js"></script> <script language="javascript" type="text/javascript"> function change(boxid,divtoaffect) { content = document.getElementById("" + boxid + "").value.replace(/\n/g, '<br>'); document.getElementById(divtoaffect).innerHTML = content; } function select1() { test=document.getElementById("changeMe"); test.style.backgroundImage="url('Sunset.jpg')"; } function select2() { test=document.getElementById("changeMe"); test.style.backgroundImage="url('Blue hills.jpg')"; } function PrintElem(elem) { Popup($(elem).text()); } function Popup(data) { var mywindow = window.open('', 'my div', 'height=400,width=600'); mywindow.document.write('<html><head><title>my div</title>'); /*optional stylesheet*/ //mywindow.document.write('<link rel="stylesheet" href="main.css" type="text/css" />'); mywindow.document.write('</head><body >'); mywindow.document.write(data); mywindow.document.write('</body></html>'); mywindow.document.close(); mywindow.print(); return true; } // Print DIV function printContent(id){ str=document.getElementById(id).innerHTML newwin=window.open('','printwin','left=100,top=100,width=400,height=400') newwin.document.write('<HTML>\n<HEAD>\n') newwin.document.write('<TITLE>Print Page</TITLE>\n') newwin.document.write('<script>\n') newwin.document.write('function chkstate(){\n') newwin.document.write('if(document.readyState=="complete"){\n') newwin.document.write('window.close()\n') newwin.document.write('}\n') newwin.document.write('else{\n') newwin.document.write('setTimeout("chkstate()",2000)\n') newwin.document.write('}\n') newwin.document.write('}\n') newwin.document.write('function print_win(){\n') newwin.document.write('window.print();\n') newwin.document.write('chkstate();\n') newwin.document.write('}\n') newwin.document.write('<\/script>\n') newwin.document.write('</HEAD>\n') newwin.document.write('<BODY onload="print_win()">\n') newwin.document.write(str) newwin.document.write('</BODY>\n') newwin.document.write('</HTML>\n') newwin.document.close() } </script> </head> <body> <style type="text/css"> #output1,#output2 ,#output3 { width: 300px; word-wrap: break-word; border: solid 1px black; } </style> HTML <div style="width:650px;height:300px;" id="changeMe" > <table cellpadding="5" cellspacing="0" width="100%" style="margin:auto;"> <tr> <td><div class="dynDiv_moveDiv" id="output1" style="font-weight:bold;height:20px;margin-top:40px;"> <div class="dynDiv_resizeDiv_tl"></div> <div class="dynDiv_resizeDiv_tr"></div> <div class="dynDiv_resizeDiv_bl"></div> <div class="dynDiv_resizeDiv_br"></div> </div> </td> </tr> <tr> <td><div class="dynDiv_moveDiv" id="output2" style="height:40px;margin-top:30px;"> <div class="dynDiv_resizeDiv_tl"></div> <div class="dynDiv_resizeDiv_tr"></div> <div class="dynDiv_resizeDiv_bl"></div> <div class="dynDiv_resizeDiv_br"></div> </div></td> </tr> <tr> <td><div class="dynDiv_moveDiv" id="output3" style="height:50px;margin-top:40px;"> <div class="dynDiv_resizeDiv_tl"></div> <div class="dynDiv_resizeDiv_tr"></div> <div class="dynDiv_resizeDiv_bl"></div> <div class="dynDiv_resizeDiv_br"></div> </div></td> </tr> </table> </div> <tr> <td align="center"><input type="button" value="Print Div" onClick="printContent('changeMe')" /> </td> </tr>

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  • Using JSON, passing variable from php to javascript

    - by Ryan Fung
    I wonder why it is not working? check_login.php <?php session_start(); $data = array("username" => "true"); echo json_encode($data); ?> my js file var linkName; $.ajax({ type: "POST", url: "check_login.php", dataType: "json", success: function(json){ if(json.username != "true") { //do something } } }); I am trying to get the username after checking whether or not the user has signed in yet in the php file, something like passing a session variable. But currently passing a string seems to already have a problem. Any know what I did wrong here? Still not working the code above. Anyone want to help me out here?

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  • How do you use vim's quickfix feature?

    - by hora
    I'm a pretty new Vim user and I've found that its learning curve is quite steep (at least for me). I just installed this vim script for JavaScriptLint error checking, which shows errors in vim's quickfix window once I save a buffer. However, I don't know what to do next.. How do I 'scroll' through all the errors? How do I close the quickfix 'window'? How do I get it to check for errors after I've made changes to my code? I've looked at the vim quickfix docs but the amount of commands are overwhelming and I can't seem to find what I want. Any help would be appreciated. A side question: is there any way to have javascriptlint check for js errors for code residing in a .html file? Thanks!

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  • Using Javascript in Google Web Optimizer Page Sections

    - by Chris S
    Is it possible to use Javascript in the content of a page section variation? I want different variations to make different Javascript function calls, so I have variation content like: Variation 1 <script type="text/javascript">my_func('abc');</script> Variation 2 <script type="text/javascript">my_func('def');</script> However, when I preview my page, I can't verify that my_func(content){ alert(content); } is actually being run. Does GWO not support JS content, or am I missing something?

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  • Need help in changing the background color of "flair"

    - by Bragaadeesh
    Hi, I am trying to include the "flair" in my website. One problem I face is that I cannot change the background color. I went to the flair page and saw that I should use the css style to change. I am very poor in CSS. I have my domain in blogger. So it would be really helpful if someone could tell me how to do it. This is what i've done which is not working <script style="background-color:grey" src="http://stackoverflow.com/users/flair/252398.js?theme=clean" type="text/javascript"></script>

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  • PHP - Looking for an HTML Generator/Manager

    - by John Himmelman
    I'm trying to find a tool that I can use to generate markup programatically (non-irl word). Here is an example of what I'm trying to accomplish in pseudo-code... $htmlDoc = new HTML_Document(); $htmlDoc->setTitle('Cool Title'); $htmlDoc->addJs('some_js_file.js'); $htmlDoc->addStylesheet('some_css_file.css'); $divElement = new HTML_Element_Div(); $htmlDoc->append('body', $divElement); $output = $htmlDoc->generate(); What is the best tool for this?

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  • Eclipse Basic Web Development?

    - by Sean Ochoa
    I want to start doing web development with Eclipse. Not Java, tomcat, axis2, or anything else anymore complicated than basic XHTML / JS / CSS development, at this time. Problem 1: I realize that it can edit those files, but its trying to manage my HTML docs as part of "my workspace", and all I want it to do is manage the files as part of my local www server HTdocs directory. Problem 2: I would like to edit WYSIWYG-style, if possible. I tried installing a plug-in for that, but I wasn't able to get w4 toolkit to function properly. This would really help me to speed up development, I think. Follow-up: I've installed WTP and its dependencies (except for the tests portion, which had install problems due to dependencies that were seemingly irreconcilable).

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  • Servlet receives OPTIONS instead of GET requests from jQuery?

    - by Urs
    All I want to achieve is to implement a servlet providing a json feed for my fullcalendar application. When I inspect http://arshaw.com/js/fullcalendar/examples/json.html with Bugzilla, I see that GET-requests are sent to receive the json feed. However, when I use this example within my scenario, fullcalendar seems to send OPTIONS-requests. The only difference is that I replaced "events: "json-events.php" with "http://localhost:8080/CalendarServletTest/HelloWorldServlet" (the url of my servlet). What do I miss? Or is this really a bug?

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  • Uploadify uploadSettings with scripData does not work

    - by kubilayeksioglu
    Hi everyone, I am sending a file to my Java Servlet via jQuery Uploadify, there are no problems while sending the actual file. But when I try to send some scriptData with file along, to process on Servlet it just does not send anything. Here is the JS code: $("button").click(function(){ $("#uploadify").uploadifySettings('scriptData', {'length':'0.2'}); $('#uploadify').uploadifyUpload(); }); $('#uploadify').uploadify({ 'uploader': 'assets/uploadify/uploadify.swf', 'script': 'upload', 'folder': '/uploads' }); And here is the Servlet code on the server side: out.println(res.getParameter("length")); Only output I get is null, while expecting "0.2". I just cannot get what's wrong and any kind of help will be appreciated. Thanks in advance.

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  • Mac dashboard widgets not loading external images

    - by andrhamm
    I set out to make a quick Mac OS X dashboard widget. I read the documentation and was pleased to find out they use simple HTML, JS, and CSS. I created my widget and it works when I open the .html file in Firefox, but it does not work when I install the widget to the dashboard. The widget is simple: it displays the most recent image from a weather web cam stream. The image URLs look like this: http://webcam.com/stream.jpg?1274213999617. The timestamp is appended to the URL and the server automatically responds with the latest image for that time. I did not write the server script. The widget appears to be loading correctly, but the web cam image will not load. Notice the blue question mark in the upper left. The image should appear over the square background image. Is there any special procedure for loading external images into a widget?

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  • Reliable way to get the "ancestor" of an object with a specific classname, using jQuery

    - by Matt Dawdy
    I've got a javascript function that gets called on change event of a select form element. So, the "this" variable in js refers to the select element. This select element is in a td tag, in a tr tag. The tr tag has a classname of "FilterDetailsRow". Now, I've tested, and if I use this syntax: var filterRow = $(this).parent().parent(); it gets me what I want. However, is there a better way to tell jQuery, "starting with "this" can you please go up my tree of parents until you find one with a classname of "FilterDetailsRow"? Here's what I came up with, but I want to make sure I"m not reinventing the wheel. function GetFilterDetailsRowOfObject(o) { if (o) { if (o.parent()[0].className.indexOf("FilterDetailsRow") != -1) return o; else return GetFilterDetailsRowOfObject(o.parent()); } else { return null; } } Thanks for any advice.

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  • Should we denormalize database to improve performance?

    - by Groo
    We have a requirement to store 500 measurements per second, coming from several devices. Each measurement consists of a timestamp, a quantity type, and several vector values. Right now there is 8 vector values per measurement, and we may consider this number to be constant for needs of our prototype project. We are using HNibernate. Tests are done in SQLite (disk file db, not in-memory), but production will probably be MsSQL. Our Measurement entity class is the one that holds a single measurement, and looks like this: public class Measurement { public virtual Guid Id { get; private set; } public virtual Device Device { get; private set; } public virtual Timestamp Timestamp { get; private set; } public virtual IList<VectorValue> Vectors { get; private set; } } Vector values are stored in a separate table, so that each of them references its parent measurement through a foreign key. We have done a couple of things to ensure that generated SQL is (reasonably) efficient: we are using Guid.Comb for generating IDs, we are flushing around 500 items in a single transaction, ADO.Net batch size is set to 100 (I think SQLIte does not support batch updates? But it might be useful later). The problem Right now we can insert 150-200 measurements per second (which is not fast enough, although this is SQLite we are talking about). Looking at the generated SQL, we can see that in a single transaction we insert (as expected): 1 timestamp 1 measurement 8 vector values which means that we are actually doing 10x more single table inserts: 1500-2000 per second. If we placed everything (all 8 vector values and the timestamp) into the measurement table (adding 9 dedicated columns), it seems that we could increase our insert speed up to 10 times. Switching to SQL server will improve performance, but we would like to know if there might be a way to avoid unnecessary performance costs related to the way database is organized right now. [Edit] With in-memory SQLite I get around 350 items/sec (3500 single table inserts), which I believe is about as good as it gets with NHibernate (taking this post for reference: http://ayende.com/Blog/archive/2009/08/22/nhibernate-perf-tricks.aspx). But I might as well switch to SQL server and stop assuming things, right? I will update my post as soon as I test it.

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  • JavaScript: What would cause setInterval to stop firing?

    - by Rosarch
    I am writing a chat AJAX app. Randomly, in FF 3.5.9, setInterval() seems to stop firing. I don't have clearInterval() anywhere in my code. What could be causing this to happen? $(document).ready(function () { $("#no-js-warning").empty(); messageRefresher = new MessageRefresher(0); setInterval($.proxy(messageRefresher, "refresh"), 2000); }); function notifyInRoom(user) { $.getJSON('API/users_in_room', { room_id: $.getUrlVar('key'), username: user }, function (users) { if (!$.isEmptyObject(users)) { $("#users").empty(); $.each(users, function (index, username) { var newChild = sprintf("<li>%s</li>", username); $("#users").append(newChild); }); } else { $("#users-loading-msg").text("No one is in this room."); } }); } function MessageRefresher(latest_mid) { this._latest_mid = latest_mid; } MessageRefresher.prototype.refresh = function () { notifyInRoom($("#user-name").val()); var refresher = this; $.getJSON('API/read_messages', { room_id: $.getUrlVar('key'), mid: refresher._latest_mid }, function (messages) { if (! (messages == null || $.isEmptyObject(messages[0]))) { // messages will always be at least [[], [], 0] $("#messages-loading-msg").hide(); for (var i = 0; i < messages[0].length; i++) { var newChild = sprintf('<li><span class="username">%s:</span> %s</li>', messages[1][i], messages[0][i]); $("#messages").append(newChild); } refresher._latest_mid = messages[2]; setUserBlockClass(); } else { $("#messages-loading-msg").text("No messages here. Say anything..."); } }); } // Give the end-user-block class to the appropriate messages // eg, those where the next message is by a different user function setUserBlockClass() { $("#messages li").each(function (index) { if ($(this).children(".username").text() != $(this).next().children(".username").text()) { $(this).addClass("end-user-block"); } }); } I checked the most recent responses in Firebug, and it was the same responses that had been sent earlier. (So, it's not like an unusual response caused a crash.) If I refresh the page, the calls resume.

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  • What does this JavaScript error mean?

    - by Tommy
    Using the “Venkman” JavaScript debugger for Mozilla and getting the following error: XML Parsing Error: not well-formed Location: x-jsd:source?location=http%3A%2F%2F192.168.1.150%2Fscript.js&instance=337 Line Number 557, Column 50:<line><margin x='t'> - </margin><num> 554</num> ?? valid = false;</line> Functions works but I don't understand the error. Any help is appreciated. Thanks. function ValidateCheckBoxes() { var valid; $(document).ready(function(){ if($('input[@name=boxesA]:checked').size() == 0) {     valid = false; } else { valid = true; } }); return valid; }

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  • Add client-side events to ASP.Net custom control at runtime

    - by nw
    I'm building an ASP.net custom control that implements IScriptControl. I would like other users of my control to be able to assign client-side event handlers to the control. Unfortunately the JS generated by IScriptControl is always injected at the very bottom of the rendered page (see below), so any attempt to assign an event handler in the ASPX page fails because the code executes too early. ... <script type="text/javascript"> //<![CDATA[ Sys.Application.initialize(); Sys.Application.add_init(function() { $create(MyNamespace.MyControl, {}, null, null, $get("my_control_id")); }); //]]> </script> </form> What's the right way to assign an event handler to the instantiated control upon page load?

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