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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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  • infoWindow on MarkerClusterer

    - by vishwanath
    I need infoWindow to be opened instead of zooming in map, when clicking on the ClusterMarker. I am using Gmaps util library MarkerClusterer for creating cluster of markers. I tried changing following line in markerclusterer.js ClusterMarker_.prototype = new GOverlay(); with ClusterMarker_.prototype = new GMarker(); so that I can get the openInfoWindow() function in the clustermarker, but that didnt worked out. Got some error. If possible, Please suggest solution so that this can be done with MarkerClusterer. Or else any other library which will be able to do this. Any help will be appreciated.

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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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  • 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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  • 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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  • 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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  • 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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  • When should I observe javascript events on window vs. document vs. document.body?

    - by brahn
    I'm using prototype.js for my web app, and I have everything running on chrome, safari, and firefox. I am now working on IE8 compatibility. As I've been debugging in IE, I've noticed that there are javascript events for which I have previously set an observer on the window, e.g. Event.observe(window, eventType, function () {...}); (where eventType might be "dom:loaded", "keypress", etc.) and it works just fine in Chrome/Safari/Firefox. However, in IE the observer never fires. In at least some cases I could get this to work on IE by instead placing the observer on something other than window, e.g. document (in the case of "dom:loaded") or document.body (in the case of "keypress"). However, this is all trial-and-error. Is there some more systematic way to determine where to place these observers such that the results will be cross-browser compatible? Thanks!

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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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • Geolocation under firefox 3.6 requires Proxy Authentication?

    - by prem
    I am trying to share my location on geolocation enabled pages from firefox 3.6, but doesn't seem to get any kind of success or failures. When I wrote my custom js containing navigator.geolocation.getCurrentPosition(func1,func2), the success callback isn't called at all. When I tamper the http requests on firefox, the request to https://www.google.com/loc/json returns with status: 407 [Proxy Authentication Required ( The ISA Server requires authorization to fulfill the request. Access to the Web Proxy filter is denied. )]... Yes, my network is behind a proxy server. But the same works with Chrome. I didn't try other browsers yet.

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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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  • 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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  • Jquery DateJs, is there validation for full date?

    - by Cesar Lopez
    Hi all, I just find out about the power of date js, And its great!!! As I am a newbie I was wondering if there is any kind of general validitation for different types of full dates. eg. var d1 = Date.parse('2000-10-18, 10:06 AM'); alert(d1.toString('HH:mm')); If date is ('200-10-18, 10:06 AM'), of course it doesn't like it. So my question is if there is any quick way to validate the full date, rather than having to validate one by one. Thanks.

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  • How do you make javascript code execute *in order*

    - by Ed
    Okay, so I appreciate that Javascript is not C# or PHP, but I keep coming back to an issue in Javascript - not with JS itself but my use of it. I have a function: function updateStatuses(){ showLoader() //show the 'loader.gif' in the UI updateStatus('cron1'); //performs an ajax request to get the status of something updateStatus('cron2'); updateStatus('cron3'); updateStatus('cronEmail'); updateStatus('cronHourly'); updateStatus('cronDaily'); hideLoader(); //hide the 'loader.gif' in the UI } Thing is, owing to Javascript's burning desire to jump ahead in the code, the loader never appears because the 'hideLoader' function runs straight after. How can I fix this? Or in other words, how can I make a javascript function execute in the order I write it on the page...

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  • twitter's profile widget include in a separate javascript file

    - by raulricardo21
    Hi stackoverflowers, I'm just trying to put the custom twitter's profile widget on my page, but I like to put the code in a separate javascript's file. so, I don't know how to do that. I mean, I put this on head tag <script type="text/javascript" src="http://widgets.twimg.com/j/2/widget.js"></script> the create a div for the widget, an put the rest of the code in another javascript new TWTR.Widget(json_twitter_options).render().setUser('username').start(); But, how to "put" the result in that widget... I'm totally lost, thanks in advance.

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  • ASP.NET 3.5 C# : Combine images in one download

    - by Mark
    Hi All, I Would like to know if its possible to combine mulitple images in 1 download. On my homepage I'm showing 12 images which change depending on the country of the user. I notice this takes a lot of time to download for some users and i would like to know if it's possible to combine them into one download with an httphandler (in the way u can combina js and css) or even create 1 static image out of those 12. For an example check here link text Thanks for your time! Kind regards, Mark

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  • How to change onmouseover event to onclick instead in javascript?

    - by KT
    I am using this plugin in wordpress http://www.iwebix.de/front-slider-wordpress-plugin-demo/ As you can see in the demo above, the left and right arrow buttons are the controls for scrolling the thumbnails and the event is onmouseover and onmouseout. I don't know how to change this to onclick instead so that the thumbnails will scroll left and right only when the buttons are clicked. Any help or ideas on how to do this? Thanks! Here is the script. http://www.iwebix.de/wp-content/plugins/front-slider/scripts/slider.js

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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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  • jwplayer embedded with recent flash with html5 back end cant hide controls or add autoplay and loop

    - by Daniel Redwood
    Hey all, After the unfortunate realization that Firefox is just not going to play nice with an embedded HTML5 video with my server set up, I've decided to go the JW Player route, since it's compatible with iPads and iPhones. I can get the file to show up on my page, but it's big and heavy. I would like for it to be just the video, no controls. Autoplay and on loop. Can you help me out? Here's the code... <div id="container">Loading the player ...</div> jwplayer("container").setup({ flashplayer: "jwplayer/player.swf", file: "Video/fernando.m4v", height: 520, width: 780, }); <script type='text/javascript' src='swfobject.js'></script>

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