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  • While Mouse press event. Prototype JS or Javascript

    - by nahum
    Hi, I would like to know if someone knows how to make a function repeat over and over while the mouse is press, I don't know how to make it work. I know in prototype you can take events like $('id').observe("click",function(event){}) $('id').observe("leave",function(event){}) $('id').observe("change",function(event){}) //etc... but is something like $('id').observe("whilemousepress",function(event){}) :P //I know there is not any event in javascript but I would like to emulate. thanks...

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  • Calling javascript class within other Js

    - by harigm
    I have Aptana plugin in eclipse, I have a javascript (one.js) and i have included one more Javscript(two.js) within one.js. I click on any functions within one.js and if those functions exists in the same one.js, the control is going to the respective function. Suppose if the function exists in two.js, the control is not going to two.js Can any one help me with this?

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  • Javascript Running slow in IE

    - by SharePoint Newbie
    Hi, Javascript is running extremely slow on IE on some pages in our site. Profiling seems to show that the following methods are taking the most time: (Method, count, inclusive time, exclusive time) JScript - window script block 2,332 237.98 184.98 getDimensions 4 33 33 eh 213 32 32 extend 446 30 30 tt_HideSrcTagsRecurs 1,362 26 26 String.split 794 18 18 $ 717 49 17 findElements 104 184.98 14 What does "JScript - window script block" do? We are using jquery and prototype. Thanks,

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  • Divs over images using JavaScript

    - by Abhi
    Say I have an image with a couple of dots in a web page. When someone clicks on the dots I want a JavaScript function to be executed and then a div placed over the clicked dot in the image. Something akin to markers in maps. How do I go about doing this?

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  • Capture link clickthrough events from Javascript

    - by Silver Dragon
    In order to track the overall user clickstream, I'd like to fire a javascript event, if the user right-clicks, and select "Open in new Tab" (or middle-clicks in most browsers) on a link. Most of these links are linking outside of my site, and I'd like to interfere with overall browser experience (such as: status bar, etc) as little as possible. What options are there to solve this?

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  • shuffling array javascript

    - by Dennis Callanan
    <!doctype html> <html lang="en"> <head> <meta charset="utf=8" /> <title>Blackjack</title> <link rel="stylesheet" href="blackjack.css" /> <script type="text/javascript"> var H2 = 2; var S2 = 2; var D2 = 2; var C2 = 2; var H3 = 3; var S3 = 3; var D3 = 3; var C3 = 3; var deck = new Array(H2, S2, D2, C2, H3, S3, D3, C3); var new_deck = new Array(); var r; document.write("deck = ") for (r =0; r<deck.length; r++){ document.write(deck[r]); } document.write("</br>") document.write("new deck = ") for (r=0; r<new_deck.length; r++){ document.write(new_deck[r]); } document.write("</br>") for (r=0;r<deck.length;r++){ var randomindex = Math.floor(Math.random()*deck.length); new_deck.push(randomindex) deck.pop(randomindex) } document.write("deck = ") for (r =0; r<deck.length; r++){ document.write(deck[r]); } document.write("</br>") document.write("new deck = ") for (r=0; r<new_deck.length; r++){ document.write(new_deck[r]); } document.write("</br>") </script> </head> <body> </body> </html> Obviously this isn't the full Blackjack game here. It's just a test to see if shuffling the array works by printing the contents of both decks (arrays) before and after the shuffle. I'm only using 8 cards at the moment, 4 2's and 4 3's. What I am getting from this is: deck = 22223333 new deck = deck = 2222 new deck = 7502 What I'm hoping to get is: deck = 22223333 new deck = deck = new deck = 23232323 (or any of the 8 numbers, generated randomly) So it should be shuffling those 8 cards, what am I doing wrong? I'm only new to javascript but I've used some python before. I've done something similar in python and worked perfectly, but I'm not sure what's wrong here. Thanks for any answers in advance!!

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  • Javascript get anchor href on click

    - by Infinity
    Hello guys! How can I get the href of an anchor when I click on it using javascript? I did the following: document.onClick = myFunc(); function myFunc() { } But how to extend the function to respond only to clicks on anchors and get the href?

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  • javascript object's - private methods: which way is better.

    - by Praveen Prasad
    (function () { function User() { //some properties } //private fn 1 User.prototype._aPrivateFn = function () { //private function defined just like a public function, //for convetion underscore character is added } //private function type 2 //a closure function _anotherPrivateFunction() { // do something } //public function User.prototype.APublicFunction = function () { //call private fn1 this._aPrivateFn(); //call private fn2 _anotherPrivateFunction(); } window.UserX = User; })(); //which of the two ways of defining private methods of a javascript object is better way, specially in sense of memory management and performance.

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  • Ajax function partially fails when alert removed

    - by YsoL8
    Hello. I have a problem in the following code: //quesry the db for image information function queryDB (parameters) { var parameters = "p="+parameters; alert ("hello"); if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { // use the info alert (xmlhttp.responseText); } } xmlhttp.open("POST", "js/imagelist.php", true); //Send the proper header information along with the request xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); xmlhttp.setRequestHeader("Content-length", parameters.length); xmlhttp.setRequestHeader("Connection", "close"); xmlhttp.send(parameters); } When I remove the alert statement 4 lines down I hit problems. This function is being called by a loop, and without the alert, I only get results for the last value sent to the statement. With it, I get everything I was expecting and really I'm at a loss to know why. I've heard that this may be a timing issue as I'm sending new requests before the old one is finished. I also heard polling being mentioned, but I can't find any information detailed enough. I'm new to synchronous services and I'm not really aware of the issues.

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  • alert(line) alerts 'ac' and typeof(line) is 'string', but charAt is not a function

    - by Delirium tremens
    alert(line) alerts 'ac' typeof(line) is 'string' When I run line.charAt(0), charAt is not a function. When line is 'http://www.google.com/', it works, I think it's the UTF-8 encoding of the file that I opened... How to make charAt work with UTF-8? UPDATED: http://mxr.mozilla.org/mozilla-central/source/netwerk/dns/src/effective_tld_names.dat?raw=1 is in my extension's chrome folder as effective_tld_names.dat To run the code: authority = 'orkut.com.br'; lines = sc_geteffectivetldnames(); lines = sc_preparetouse(lines); domainname = sc_extractdomainname(authority, lines); The code: function sc_geteffectivetldnames () { var MY_ID = "[email protected]"; var em = Components.classes["@mozilla.org/extensions/manager;1"]. getService(Components.interfaces.nsIExtensionManager); var file = em.getInstallLocation(MY_ID).getItemFile(MY_ID, "chrome/effective_tld_names.dat"); var istream = Components.classes["@mozilla.org/network/file-input-stream;1"]. createInstance(Components.interfaces.nsIFileInputStream); istream.init(file, 0x01, 0444, 0); istream.QueryInterface(Components.interfaces.nsILineInputStream); var line = {}, lines = [], hasmore; do { hasmore = istream.readLine(line); lines.push(line.value); } while(hasmore); istream.close(); return lines; } function sc_preparetouse(lines) { lines = sc_notcomment(lines); lines = sc_notempty(lines); return lines; } function sc_notcomment(lines) { var line; var commentre; var matchedcomment; var replacedlines; replacedlines = new Array(); var i = 0; while (i < lines.length) { line = lines[i]; commentre = new RegExp("^//", 'i'); matchedcomment = line.match(commentre); if(matchedcomment) { lines.splice(i, 1); } else { i++; } } return lines; } function sc_notempty(lines) { var line; var emptyre; var matchedempty; var replacedlines; replacedlines = new Array(); var i = 0; while (i < lines.length) { line = lines[i]; emptyre = new RegExp("^$", 'i'); matchedempty = line.match(emptyre); if(matchedempty) { lines.splice(i, 1); } else { i++; } } return lines; } function sc_extractdomainname(authority, lines) { for (var i = 0; i < lines.length; i++) { line = lines[i]; alert(line); alert(typeof(line)); if (line.chatAt(0) == '*') { alert('test1'); continue; } if (line.chatAt(0) == '!') { alert('test2'); line.chatAt(0) = ''; } alert('test3'); checkline = sc_checknotasteriskline(authority, line); if (checkline) { domainname = checkline; } } if (!domainname) { for (var i = 0; i < lines.length; i++) { line = lines[i]; alert(line); if (line.chatAt(0) != '*') { alert('test4'); continue; } if (line.chatAt(0) == '!') { alert('test5'); line.chatAt(0) = ''; } alert('test6'); checkline = sc_checkasteriskline(authority, line); if (checkline) { domainname = checkline; } } } return domainname; } It alerts 'ac', then 'string', then nothing.

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  • alert(line) alerts 'ac' and typeof(line) is 'string', but charAt is not a function

    - by Delirium tremens
    alert(line) alerts 'ac' typeof(line) is 'string' When I run line.charAt(0), charAt is not a function. When line is 'http://www.google.com/', it works, I think it's the UTF-8 encoding of the file that I opened... How to make charAt work with UTF-8? UPDATED: http://mxr.mozilla.org/mozilla-central/source/netwerk/dns/src/effective_tld_names.dat?raw=1 is in my extension's chrome folder as effective_tld_names.dat To run the code: authority = 'orkut.com.br'; lines = sc_geteffectivetldnames(); lines = sc_preparetouse(lines); domainname = sc_extractdomainname(authority, lines); The code: function sc_geteffectivetldnames () { var MY_ID = "[email protected]"; var em = Components.classes["@mozilla.org/extensions/manager;1"]. getService(Components.interfaces.nsIExtensionManager); var file = em.getInstallLocation(MY_ID).getItemFile(MY_ID, "chrome/effective_tld_names.dat"); var istream = Components.classes["@mozilla.org/network/file-input-stream;1"]. createInstance(Components.interfaces.nsIFileInputStream); istream.init(file, 0x01, 0444, 0); istream.QueryInterface(Components.interfaces.nsILineInputStream); var line = {}, lines = [], hasmore; do { hasmore = istream.readLine(line); lines.push(line.value); } while(hasmore); istream.close(); return lines; } function sc_preparetouse(lines) { lines = sc_notcomment(lines); lines = sc_notempty(lines); return lines; } function sc_notcomment(lines) { var line; var commentre; var matchedcomment; var replacedlines; replacedlines = new Array(); var i = 0; while (i < lines.length) { line = lines[i]; commentre = new RegExp("^//", 'i'); matchedcomment = line.match(commentre); if(matchedcomment) { lines.splice(i, 1); } else { i++; } } return lines; } function sc_notempty(lines) { var line; var emptyre; var matchedempty; var replacedlines; replacedlines = new Array(); var i = 0; while (i < lines.length) { line = lines[i]; emptyre = new RegExp("^$", 'i'); matchedempty = line.match(emptyre); if(matchedempty) { lines.splice(i, 1); } else { i++; } } return lines; } function sc_extractdomainname(authority, lines) { for (var i = 0; i < lines.length; i++) { line = lines[i]; alert(line); alert(typeof(line)); if (line.chatAt(0) == '*') { alert('test1'); continue; } if (line.chatAt(0) == '!') { alert('test2'); line.chatAt(0) = ''; } alert('test3'); checkline = sc_checknotasteriskline(authority, line); if (checkline) { domainname = checkline; } } if (!domainname) { for (var i = 0; i < lines.length; i++) { line = lines[i]; alert(line); if (line.chatAt(0) != '*') { continue; alert('test4'); } if (line.chatAt(0) == '!') { line.chatAt(0) = ''; alert('test5'); } alert('test6'); checkline = sc_checkasteriskline(authority, line); if (checkline) { domainname = checkline; } } } return domainname; } It alerts 'ac', then 'string', then nothing.

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  • javascript using 'this' in global object

    - by Marco Demaio
    What does 'this' keyword refer to when used in gloabl object? Let's say for instance we have: var SomeGlobalObject = { rendered: true, show: function() { /* I should use 'SomeGlobalObject.rendered' below, otherwise it won't work when called from event scope. But it works when called from timer scope!! How can this be? */ if(this.rendered) alert("hello"); } } Now if we call in an inline script in the HTML page: SomeGlobalObject.show(); window.setTimeout("Msg.show()", 1000); everything work ok. But if we do something like AppendEvent(window, 'load', Msg.show); we get an error because this.rendered is undefined when called from the event scope. Do you know why this happens? Could you explain then if there is another smarter way to do this without having to rewrite every time "SomeGlobalObject.someProperty" into the the SomeGlobalObject code? Thanks! AppendEvent is just a simple cross-browser function to append an event, code below, but it does not matter in order to answer the above questions. function AppendEvent(html_element, event_name, event_function) { if(html_element.attachEvent) //IE return html_element.attachEvent("on" + event_name, event_function); else if(html_element.addEventListener) //FF html_element.addEventListener(event_name, event_function, false); }

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  • Capture *all* display-characters in JavaScript?

    - by Jean-Charles
    I was given an unusual request recently that I'm having the most difficult time addressing that involves capturing all display-characters when typed into a text box. The set up is as follows: I have a text box that has a maxlength of 10 characters. When the user attempts to type more than 10 characters, I need to notify the user that they're typing beyond the character count limit. The simplest solution would be to specify a maxlength of 11, test the length on every keyup, and truncate back down to 10 characters but this solution seems a bit kludgy. What I'd prefer to do is capture the character before keyup and, depending on whether or not it is a display-character, present the notification to the user and prevent the default action. A white-list would be challenging since we handle a lot of international data. I've played around with every combination of keydown, keypress, and keyup, reading event.keyCode, event.charCode, and event.which, but I can't find a single combination that works across all browsers. The best I could manage is the following that works properly in =IE6, Chrome5, FF3.6, but fails in Opera: NOTE: The following code utilizes jQuery. $(function(){ $('#textbox').keypress(function(e){ var $this = $(this); var key = ('undefined'==typeof e.which?e.keyCode:e.which); if ($this.val().length==($this.attr('maxlength')||10)) { switch(key){ case 13: //return case 9: //tab case 27: //escape case 8: //backspace case 0: //other non-alphanumeric break; default: alert('no - '+e.charCode+' - '+e.which+' - '+e.keyCode); return false; }; } }); }); I'll grant that what I'm doing is likely over-engineering the solution but now that I'm invested in it, I'd like to know of a solution. Thanks for your help!

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  • JavaScript local alias pattern

    - by Latest Microsoft Blogs
    Here’s a little pattern that is fairly common from JavaScript developers but that is not very well known from C# developers or people doing only occasional JavaScript development. In C#, you can use a “using” directive to create aliases of namespaces Read More......(read more)

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  • Best IDE for HTML, CSS, and Javascript for mac [closed]

    - by jon2512chua
    I'm currently looking to move to using an IDE for web development. The options I'm considering are: Aptana Studio Coda Expresso Please base your answers on the following criteria, in descending order of importance: Supports HTML, CSS, JavaScript Powerful (having good code completion, good debugger, great syntax highlighting etc) Fast and light Supports HTML5, CSS3, and major JavaScript frameworks (JQuery or YUI) Great design (both usability and aesthetics) Supports PHP, Ruby, and Python Has Git integrated I've updated the question to be more objective. I'm mainly looking for an answer that addresses how well each of the IDEs addresses my criteria.

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  • Learning how to integrate JavaScript with other languages

    - by beacon
    After learning JavaScript syntax, what are some good resources for learning about integrating JavaScript with other languages (HTML, XML, CSS, PHP) to create real, useful applications? I'm most interested in reading articles or other people's code - not so interested in books. Basically, I'm looking to move from programming puzzle-solvers to programming complex applications and could use some advice.

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  • TypeScript or JavaScript for noob web developer [closed]

    - by Phil Murray
    Following the recent release by Microsoft of TypeScript I was wondering if this is something that should be considered for a experienced WinForm and XAML developer looking to get into more web development. From reviewing a number of sites and videos online it appears that the type system for TypeScript makes more sense to me as a thick client developer than the dynamic type system in Javascript. I understand that Typescript compiles down to JavaScript but it appears that the learning curve is shallower due to the current tooling provided by Microsoft. What are your thoughts?

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  • Tools for building long-running Javascript webapp

    - by FilipK
    Given my lack of familiarity with such tools, could you suggest what tools / frameworks would be suitable for developing a long-running JavaScript webapp? The webapp would display a constantly updating chart. The updates would come through WebSockets (preferably) or XmlHttpRequest. I know and have written JavaScript with JQuery, but for this task I assume something like backbone.js or ExtJS would be appropriate (or maybe not?).

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  • JavaScript: catching URI change

    - by ptrn
    I have a site where I'm using hash based parameters, eg. http://url.of.site/#param1=123 What I want When the user manually changes the URI to eg. http://url.of.site/#param1=789 When the user enters this URI, the event is caught by the JavaScript, and the appropriate functions are called. Basically, what I'm wondering about is; is there an event listener for this? Or would I have to periodically check the URI to see if it has been changed? I'm already using the current jQuery API, if that helps. _L

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  • Leaving out type="text/javascript" language="javascript"

    - by coffeeaddict
    Most of the script tags I create, I always include type="text/javascript" language="javascript" in the tag. My boss however does not. Sometimes he excludes both, sometimes just has language=javascript even without the quotes Now we have not had an issue in any of the major browsers with his tags. I'm talking about all versions of IE, FF, Safari, and Chrome. Personally I feel it's laziness and just totally improper and bad coding practice to leave stuff out like this even if it works without it. Anyone know if both should be included or just one or is it ok to leave both out in ASP.NET?

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  • JavaScript inline events syntax

    - by Mic
    Is there any reason to use one of the following more than the others: <input type="button" value="b1" onclick="manageClick(this)" /> <input type="button" value="b2" onclick="manageClick(this);" /> <input type="button" value="b2" onclick="manageClick(this);return false;" /> <input type="button" value="b3" onclick="return manageClick(this);" /> <input type="button" value="b4" onclick="javascript:return manageClick(this);" /> And please do not spend your valuable time to tell me to use jQuery or attachEvent/addEventListener. It's not really the objective of my question.

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  • Server Side Javascript

    - by XGreen
    Hi all, I can't help to see in many sites I visit the enthusiasm about server side javascript and the appealing look of a single language governing all tiers of the site. Mozilla Rhino, Aptana Jaxer and various John Resig's articles are some of the highlights of my search. I wanted to ask for some input from you guys on SO. your opinions and preferably experience in this. I do most of the data access and business logic currently either with asp.net or php depending on the hosting package of the client. Is anyone among you who's gave up these for ssjs?

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  • JavaScript Intellisene Problem?

    - by James Wiseman
    I've got an issue with JavaScript intellisense in Visual Web Developer 2008, which I'm starting to believe is "just one of those things", but thought I'd ask here just to check. I have a file MyOtherFile.js with a function GetRandomNumber() defined like so: function GetRandomNumber() { /// <summary> /// Summary description for GetRandomNumber /// </summary> return Math.random(); } When I reference this from another file, screen.js (/// <reference path="MyOtherFile.js" />) I get the intellisense as expected with the summary text as above. If, however, I call the function GetRandomNumber from within its own file (MyOtherFile.js) then I don't get the sumamry description. Any thoughts? Thanks.

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