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  • ERB doesnt get executed in javascript scripts

    - by Stefano
    Hi guys I have a select input on my page. this select input displays/hides fields in the form. This all works fine. But the problem is that if i submit the form and lack some necessary fields, it doesnt set the select to the right value afterwards. I just cant get the embedded ruby to work! it keeps escaping the whole thing... here my code: $(document).ready(function() { $("#profile_sex").val('<%= @profile.sex %>') $("#profile_sex").change(function(){ ($(this).val() == "Frau") ? $('#form-female').show() : $('#form-female').hide(); ($(this).val() == "Mann") ? $('#form-male').show() : $('#form-male').hide(); if ($(this).val() == "Paar") { $('#form-female').show(); $('#form-male').show(); } }); }); why doesnt this work??? I dont get any error or anything it just sets the value to "<%= @profile.sex =" I was googling and searching about on stack overflow and railscasts, the rails API, everything. Im seriously confused... thanks for your help.

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  • Javascript focus and select not working in FF

    - by Metropolis
    Hey guys, Using jQuery, the following is not working in FF, but it is in IE $(this).focus().select(); I looked around for this and found that you could use a timeout to get around this, but that is not something I want to do if I can avoid it. Does anyone know another way to do this and have it work in FF? Metropolis

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  • Auto-resize large images with JavaScript?

    - by Yegor
    I have an application that allows people to post images on each others profiles with bb code. Problem is, some post very large images, which cover other parts of the site when are viewed. How can I scale down images, client-side, so they are no bigger than x by y dimensions?

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  • javascript - switch not working

    - by Fernando SBS
    function FM_log(level, text) { // caso não seja log total escolhe o que loga var log = false; switch (level) { case "addtoprio()":log = true; case "alternaTropas()":log = false; case "sendtroops()":log = false; defalt: log = false; } if ((logTotal == false) && (log == true)) GM_log(horaAtual() + " - "+level+", "+text); else if (logTotal == true) GM_log(horaAtual() + " - "+level+", "+text); } how to do that switch is a way it works?

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  • Convert ISO/Windows charsets to UTF-8 in Javascript

    - by Amir
    I'm developing a firefox plugin and i fetch web pages to do some analysis for the user. The problem is when i try to get (XMLHttpRequest) pages that are not utf-8 encoded the string i see is messed up. For example hebrew pages with windows-1125 or Chinese pages with gb2312. I already tried the following: var uDecoder=Components.classes["@mozilla.org/intl/scriptableunicodeconverter"].getService(Components.interfaces.nsIScriptableUnicodeConverter); uDecoder.charset="windows-1255"; alert( xhr.responseText ); var decoder=Components.classes["@mozilla.org/intl/utf8converterservice;1"].getService(Components.interfaces.nsIUTF8ConverterService); alert(decoder.convertStringToUTF8(xhr.responseText,"WINDOWS-1255",true)); I also tried escape/unescape/encodeURIComponent any ideas???

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  • Returning a private variable in JavaScript

    - by enrmarc
    I don't know why console.log(Set.current_index) shows 0 instead of 3. var Set = (function() { var set = []; var index = 0; function contains(set, e) { for (var i = 0; i < set.length; i++) { if (set[i] === e) { return true; } } return false; } var add = function(e) { if (!contains(set, e)) { set[index++] = e; } } var show = function() { for (var i = 0; i < set.length; i++) { console.log(set[i]); } } return { add: add, show: show, current_index: index }; })();? Set.add(20); Set.add(30); Set.add(40); Set.show(); console.log(Set.current_index);

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  • How to print object data in javascript

    - by rxzhang
    I have the following object data: var response = { "response": { "numFound": 7945, "docs": [{ "description": "target", "url": "target", "id": "269653", "score": 6.9186745 }, { "description": "Target Kent", "url": "Target_Kent", "id": "37275", "score": 4.3241715 }] }, "highlighting": { "269653": { "description": ["<em>target</em>"] }, "37275": { "description": ["<em>Target</em> Kent"] } } }; I can use response.response.docs[0].description to print out "target". But I don't know how to print out "<em>target</em>". Thanks.

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  • javascript window.close, once again

    - by John Kjøller
    Im sorry if I havent done my research properly, - but couldnt find the answer I needed, so here goes: From my main page I open a new window using mainPlayer = window.open(); This window stays open until user clicks on a mainPlayer.close(); event. (or simply x closes the window) However, the idea is to make it possible to let the player keep playing, while browsing around the rest of the pages. But as soon as the user leaves the page that opened the mainPlayer window, the reference to the mainPlayer window seem to be lost. How do I, from the site's other pages, check if the mainPlayer window is open and close it on a click event? Thx John

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  • Javascript memory leak/ performance issue?

    - by Tom
    I just cannot for the life of me figure out this memory leak in Internet Explorer. insertTags simple takes string str and places each word within start and end tags for HTML (usually anchor tags). transliterate is for arabic numbers, and replaces normal numbers 0-9 with a &#..n; XML identity for their arabic counterparts. fragment = document.createDocumentFragment(); for (i = 0, e = response.verses.length; i < e; i++) { fragment.appendChild((function(){ p = document.createElement('p'); p.setAttribute('lang', (response.unicode) ? 'ar' : 'en'); p.innerHTML = ((response.unicode) ? (response.surah + ':' + (i+1)).transliterate() : response.surah + ':' + (i+1)) + ' ' + insertTags(response.verses[i], '<a href="#" onclick="window.popup(this);return false;" class="match">', '</a>'); try { return p } finally { p = null; } })()); } params[0].appendChild( fragment ); fragment = null; I would love some links other than MSDN and about.com, because neither of them have sufficiently explained to me why my script leaks memory. I am sure this is the problem, because without it everything runs fast (but nothing displays). I've read that doing a lot of DOM manipulations can be dangerous, but the for loops a max of 286 times (# of verses in surah 2, the longest surah in the Qur'an).

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  • Form submit in javascript

    - by zac
    Hi been wrestling this form and the last step (actually submitting) has me scratching my head. What I have so far is the form: <form id="theForm" method='post' name="emailForm"> <table border="0" cellspacing="2"> <td>Email <span class="red">*</span></td><td><input type='text'class="validate[required,custom[email]]" size="30"></td></tr> <td>First Name:</td><td><input type='text' name='email[first]' id='first_name' size=30></td></tr> <tr height="30"> <td cellpadding="4">Last Name:</td><td><input type='text' name='email[last]' id='e_last_name' size=30> <td>Birthday</td> <td><select name='month' style='width:70px; margin-right: 10px'> <option value=''>Month</option> <option value="1">Jan</option> <option value="2">Feb</option> .... </select><select name='day' style='width:55px; margin-right: 10px'> <option value=''>Day</option> <option value="1">1</option> <option value="2">2</option> ... <option value="31">31</option> </select><select name='year' style='width:60px;' > <option value=''>Year</option> <option value="2007">2007</option> <option value="2006">2006</option> <option value="2005">2005</option> ... </select> <input type='image' src='{{skin url=""}}images/email/signUpButt.gif' value='Submit' onClick="return checkAge()" /> <input type="hidden" id= "under13" name="under13" value="No"> and a script that checks the age and sets a cookie/changes display function checkAge() { var min_age = 13; var year = parseInt(document.forms["emailForm"]["year"].value); var month = parseInt(document.forms["emailForm"]["month"].value) - 1; var day = parseInt(document.forms["emailForm"]["day"].value); var theirDate = new Date((year + min_age), month, day); var today = new Date; if ( (today.getTime() - theirDate.getTime()) < 0) { var el = document.getElementById('emailBox'); if(el){ el.className += el.className ? ' youngOne' : 'youngOne'; } document.getElementById('emailBox').innerHTML = "<style type=\"text/css\">.formError {display:none}</style><p>Good Bye</p><p>You must be 13 years of age to sign up.</p>"; createCookie('age','not13',0) return false; } else { createCookie('age','over13',0) return true; }} that all seems to be working well.. just missing kind of a crucial step of actually submitting the form if it validates (if they pass the age question). So I am thinking that this will be wrapped in that script.. something in here : else { createCookie('age','over13',0) return true; } Can someone please help me figure out how I could handle this submit?

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  • Can't set element ID in JavaScript, it's always undefined

    - by Dylaan Alith
    Hi, I want to have a function that generates ID's on the fly for a given jquery object, if it doesn't have one already. These ID's should then be used in future requests. I came up with the code below, but it doesn't work. The ID's are never set. The commented out alert statement below always return undefined. I always pass code like $(this) or $(options.el) as a parameter to substitute 'el'. Initially, the elements do not have explicitly ID set in HTML. Any help would be appreciated, here's the code: getElementId: function(el) { if(undefined == el.attr('id')) { el.attr('id',"anim-"+Math.random().toString().substr(2)); } // alert(el.attr('id')); return el.attr('id'); },

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  • JavaScript using toString on a Function object to read text content

    - by mseeley
    Calling toString() on the function below returns different strings across browsers. I understand this is because ECMA-262 15.3.4.2 leaves wiggle room for each vendor. Chrome returns the comments in addition to all syntax. Sadly Firefox 3.6 omits the comments. Based on Firefox's behavior I haven't tested IE, Opera, or Safari. function foo() { /* comment */ var bar = true; } Specifically, I am attempting to embed meta data within a specially formatted comment block within a function. Later the return value of the functions toString() method would be parsed and values returned as an object. I've been unable to locate compatibility tables or alternatives to toString(). Does the community have any ideas? Btw, pre-processing JS files isn't an option. :( Thanks a lot. :)

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  • Facebook IE9 Javascript error

    - by Yannick Richard
    This morning our game is not working on my computer under IE9. The error I get is: access denied on http://static.ak.fbcdn.net/rsrc.php/v1/yL/r/X3oFUDWWu05.js When I load this URL in Chrome, FF, and IE 8, everything works fine. But under IE9 I have the following error: 'window is undefined' Error : 800A1391 Execution Error Microsoft JScript This is a Facebook script that I have no control over. I've cleared my cache but still get the error. Any ideas?

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  • Returning JSON from JavaScript to Python

    - by Chris Lacy
    I'm writing a simple App Engine app. I have a simple page that allows a user to move a marker on a Google map instance. Each time the user drops the marker, I want to return the long/lat to my Python app. function initialize() { ... // Init map var marker = new GMarker(center, {draggable: true}); GEvent.addListener(marker, "dragend", function() { // I want to return the marker.x/y to my app when this function is called .. }); } To my (admittedly limited) knowledge, I should be: 1). Returning a JSON structure with my required data in the listener callback above 2). In my webapp.RequestHandler Handler class, trying to retrieve the JSON structure during the post method. I would very much like to pass this JSOn data back to the app without causing a page reload (which is what has happened when I've used various post/form.submit methods so far). Can anyone provide me with some psuedo code or an example on how I might achieve what I'm after? Thanks.

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  • Javascript/jQuery: remove shape/path from canvas

    - by bobsoap
    I can't seem to find the function to remove a shape or path from the canvas after it has been created. So I'm creating a bezier curve between 2 points with beginPath(); bezierCurveTo(); stroke(); closePath(); . How can I remove this from the canvas once it's been created? I need to be able to call the remove function via toggle() and blur(). I'm sure something exists for this... Thanks in advance for any help!

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  • Moving Javascript object with all bounded events to other variable

    - by Saif Bechan
    Let's say I have an anchor tag, with some events. <a id="clickme" href="/endpoint">clickme</a> <a id="clickme2" href="/endpoint2">clickme2</a> Let's use jquery for simplicity: $('#clickme').on('click', function(){.....}) I also have a variable: var myActiveVar = $('#clickme'); When I want to remove the element an every trace of it I can do this: myActiveVar.off().remove(); Here comes the problem, I want to reuse the variable. Something like this: var oldAcriveVar = myActiveVar; myActiveVar = $('#clickme2'); // Now I want to do some operations // both of the elements are still on // the page, when I'm done: oldActiveVar.off().remove(); Comeplete code: var myActiveVar = $('#clickme'); // Operate on myActiveVar var oldAcriveVar = myActiveVar; myActiveVar = $('#clickme2'); // Operate on myActiveVar which is // the new element. // Old element stays visible oldActiveVar.off().remove(); // Old element and all traces are gone Edit: Maybe the above code will work, but my problem goes beyond. I just gave a simplified example. I am using Backbone events that are bounded to object. They need to be removed when I am done with the object.

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  • Javascript private member on prototype...

    - by Wilq32
    Well I tried to figure out is this possible in any way. Here is code: a=function(text) { var b=text; if (!arguments.callee.prototype.get) arguments.callee.prototype.get=function() { return b; } else alert('already created!'); } var c=new a("test"); // creates prototype instance of getter var d=new a("ojoj"); // alerts already created alert(c.get()) // alerts test alert(d.get()) // alerts test from context of creating prototype function :( As you see I tried to create prototype getter. For what? Well if you write something like this: a=function(text) { var b=text; this.getText=function(){ return b} } ... everything should be fine.. but in fact every time I create object - i create getText function that uses memory. I would like to have one prototypical function lying in memory that would do the same... Any ideas? EDIT: I tried solution given by Christoph, and it seems that its only known solution for now. It need to remember id information to retrieve value from context, but whole idea is nice for me :) Id is only one thing to remember, everything else can be stored once in memory. In fact you could store a lot of private members this way, and use anytime only one id. Actually this is satisfying me :) (unless someone got better idea). someFunc = function() { var store = new Array(); var guid=0; var someFunc = function(text) { this.__guid=guid; store[guid++]=text; } someFunc.prototype.getValue=function() { return store[this.__guid]; } return someFunc; }() a=new someFunc("test"); b=new someFunc("test2"); alert(a.getValue()); alert(b.getValue());

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  • global variables doesn't change value in Javascript

    - by user1856906
    My project is composed by 2 html pages: 1)index.html, wich contains the login and the registration form. 2)user_logged.html, wich contains all the features of a logged user. Now, what I want to do is a control if the user is really logged, to avoid the case where a user paste a url in the browser and can see the pages of another user. hours as now, if a user paste this url in the browser: www.user_loggato.html?user=x#profile is as if logged in as user x and this is not nice. My html pages both use js files that contains scripts. I decided to create a global variable called logged inizialized to false and change the variable to true when the login is succesfull. The problem is that the variable, remains false. here is the code: var logged=false; (write in the file a.js) while in the file b.js I have: function login() { //if succesfull logged=true; window.location.href = "user_loggato.html?user="+ JSON.parse(str).username + #profilo"; Now with some alerts I found that my variable logged is always false. Why? if I have not explained well or if there is not some information in order to respond to my question let me know.

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  • javascript : how to send request in restful

    - by user495688
    Hello I want to ask you something how do I send a request to the webservice (restful) if the parameters which I will send more than one parameter? edit: this.sendRequest = function(){ var url="http://localhost:8081/inlinetrans/"; var client = new XMLHttpRequest(); var oriText =""; var stemText =""; var folText =""; client.open("PUT", url, false); client.setRequestHeader("Content-Type", "text/plain"); client.send(oriText,stemText,folText); if (client.status == 200){ client.responseText; } else{ client.statusText; } } client.send -- contents parameters which i want send to server

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  • Javascript, IE, Strings, and Performance problems

    - by Infinity
    Hey guys, So we have this product, and it's really slow in IE. We've already applied a lot of the practices advised by the IE guys themselves (like this, and this), and try to sacrifice clean code for performance in the critical parts like DOM manipulation. However, as you can see in this IE profiler screenshot.. Just "String" is the biggest offender. Almost 750ms of exclusive time. Does this mean IE is spending 750ms just instantiating Strings? I also read this stuff on the Opera dev blog: A build script can remove whitespace, comments, replace strings with Array lookups (to avoid MSIE creating a string object for every single instance of a string — even in conditions) But no more info regarding this. Anyone can clarify? It seems like IE has to create a full String instance every time you have " " in your code, which could explain this, but I don't know what the array lookup optimization would look like. BTW- we don't really do much of string concatenation anywhere in the code. The library we use is MooTools 1.2.4 Any suggestions will be appreciated! Thx

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  • Sorting Multidimensional Array with Javascript: Integers

    - by tkm256
    I have a 2D array called "results." Each "row" array in results contains both string and integer values. I'm using this script to sort the array by any "column" on an onclick event: function sort_array(results, column, direction) { var sorted_results = results.sort(value); function value(a,b) { a = a[column]; b = b[column]; return a == b ? 0 : (a < b ? -1*direction : 1*direction) } } This works fine for the columns with strings. But it treats the columns of integers like strings instead of numbers. For example, the values 15, 1000, 200, 97 would be sorted 1000, 15, 200, 97 if "ascending" or 97, 200, 15, 1000 "descending." I've double-checked the typeof the integer values, and the script knows they're numbers. How can I get it to treat them as such?

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