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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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  • Refreshing frame page using javascript

    - by Roland
    I have the following two frames frame 1 with name="top" and frame 2 with name "main". Now in main there is a button called add number, which brings up a normal browser popup, in this popup I have a form that needs to be filled in and then I click submit on this form and then the main frame should reload, the form processing happens within the popup page and then after processing the main frame should refresh. The following code does not work, Am I doing something wrong? window.opener.main.reload();

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  • javascript location

    - by Happy
    This checks "if we are on movies.php page": if (location.href.match(/movies.php/)) { // something happens } how to add for this (like or) "if we are on music.php page"?

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  • How to parse HTML from JavaScript in Firefox?

    - by hmp
    What is the best way to parse (get a DOM tree of) a HTML result of XmlHttpRequest in Firefox? EDIT: I do not have the DOM tree, I want to acquire it. XmlHttpRequest's "responseXML" works only when the result is actual XML, so I have only responseText to work with. The innerHTML hack doesn't seem to work with a complete HTML document (in <html</html). - turns out it works fine.

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  • Javascript Object Properties go to undefined after ajax request returns

    - by adasdas
    if you have an object and set a property for it, you can access that property in a function called on that object. but if you call a function and do an ajax request such that a different function is called from onreadystatechange, that secondary response function does not have access to the property. Thats a little confusing so see what I mean here. The property this.name is the one that changes. //from W3Schools website function getXHR(){if (window.XMLHttpRequest){return new XMLHttpRequest();}if (window.ActiveXObject){return new ActiveXObject("Microsoft.XMLHTTP");}return null;} function TestObject() { this.name = ""; //public var xhr = null; //private var response = function() //private { if(xhr.readyState > 3) { alert("B: my name is " + this.name); } } this.send = function() //public { alert("A: my name is " + this.name); if(xhr === null) { xhr = getXHR(); } var url = "http://google.com"; xhr.onreadystatechange = response; xhr.open("GET", url, true); xhr.send(null); } } var o = new TestObject(); o.name = "Ice Cube"; o.send(); Results are: A: my name is IceCube B: my name is undefined If response is public this happens as well. If xhr is public this also happens. Something occurs so that the response function called doesnt have access to the same parameters.

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  • Need a Javascript Expert, IE slow script

    - by Aaron Carlino
    I have a jQuery plugin running on my site that is executing very, very slowly in IE7/8 to the point that it throws a slow script warning to the user. It doesn't happen in any other browser, and I can't figure out what might be going on. If you go to this page: http://dev.xeetic.org/projects You'll see that there are 16 results on each page, and each one has a "flip" behavior attached, using the jQuery plugin "quickflip." Attaching this behavior is very slow in IE. If I reduce the result set to 8 or 4 per page, it's faster, but still very bogged down. I have contacted the author of the script with no success. I am willing to pay for a solution, if I'm allowed to offer such a thing on this site. Very desperate. Please help!

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  • looking for a javascript engine

    - by c0f33.alex
    i'm looking for a js engine to that I can (easily) expose C/C++ functions, classes etc. The API should allow changing exposed values from within C++ (by storing some kind of pointer or reference to an object inside js or so...). I've considered using google's v8 but I'm new to it and don't know whether it will satisfy my requirements. Can someone tell me whether I should stick to v8 or try something else?

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  • Javascript function question

    - by Raj
    I searched but couldn't find an answer to this seemingly easy question, so... Suppose I have a loop in which I need to set callbacks. My callback function looks like this: function callback(var1) { // code } Now my loop is something like this: for( //condition) { var x = something_different_each_time; document.getElementById('foo').addEventListener('click', function() { callback(x); }, false); } Now it looks like even if the loop runs n times, the anonymous function is compiled only once -- and hence every invocation of callback is called with the same argument (even though x varies in the loop every time). I must be missing something here.. any help is greatly appreciated! :)

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  • Javascript Alert Return value / Event

    - by Chris
    Hey, The question is pretty simple, but i'm not the big AJAX/JS coder, so I have no clue if it's possible. Is there any way that I can check whether or not an alert() was executed on a remote site? Like if I inputted an alert("Welcome to this site"); through a get variable, is there any way to check if it that alert() was actually executed in the browser? And not necessarily through AJAX/JS.

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  • Why can't I call this function (javascript/jquery)

    - by Ankur
    This is driving me nuts .... I have written a function function seraliseQuery(){ for(var i=1; i<=variables;i++){ alert(queryPreds[i]+" - "+queryObjs[i]); } } I just want to be able to call it from my other function $(".object").click( function() { // code removed seraliseQuery(); }); The error I get is "the function serialiseQuery() is undefined". Everything is within $(document).ready( function() { // code goes here }

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  • Why doesn't this work? jquery javascript

    - by mars
    $(document).ready(function() { musicList = new array() counter = 0; if($(".rA, .trA, .dA, .hA").length > 0) { /*$(".rA, .trA, .dA, .hA").each(function(e){*/ $(".hA").each(function(e){ $.post("/index/audio/ajax.track", { id: $(this).attr("rel") }, function(data){ /*THIS DOESN'NT WORK */ musicList.push(data.file); /*THIS DOESN'NT WORK */ alert(data.file);/*this words*/ }, "json"); counter++; }); if(counter>0) { alert(counter); } } }); I don't see anything wrong with the code but I have no idea why it won't work I just spent 3 hours trying to get it to work

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  • Insert into textarea | JavaScript

    - by Wayne
    I'm trying to insert the image url where the point of the is to be when editing the textarea value. function addImageURL() { var imageurl = prompt("Enter image URL", "Your name") var post = document.getElementById("message-put").value; document.getElementById('message-put').value = post + '[img]' + imageurl + '[/img]'; } This code grabs the value inside the adds the image url next to it which I don't want, I need it to insert it where the point was when editing the textarea Thanks

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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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  • Escaping and unescaping a string with single and double quotes in Javascript

    - by Reina
    I have a search box that a user can search for any string including single AND double quotes, once they have searched, the backend is passing the keyword back to me so I can put it back in the box. I don't know what the string is so I can't escape quotes myself, below is an example: var keyword = "hello"; $("#selectionkeywords").val(); The issue I am having is that if the user enters "hello" the keyword becomes ""hello"" and I get this error: missing ) after argument list [Break On This Error] jQuery("#selectionkeywords").val(""hello""); The user could also enter single quotes so that rules it out as well. I tried using escape unescape but I still have the same issue e.g. escape(""hello"") I could get the value in an unescaped format e.g. "hello" but I don't know what to do with it, escape doesn't work on it I end up with this %26%23034%3Bhello%26%23034%3B So I'm pretty much stuck at the moment as I can't do anything to the string, any ideas?

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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 - 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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  • Javascript - remove part of cookie with a split('|') like array

    - by MgS
    I'm abit stuck. I'm using jQuery. I have a cookie which has the value such as : 1,something|2,somethingg|1,something We are treating it as [0] as id and [1] as name. I need to remove ONE where the id == '1' for example, this will leave the cookie like this: 1,something|2,somethingg How do I go about this, it will probally be in a loop, but not sure how to remove one of them. I have this so far: function removeItem(id){ var cookieName = 'myCookie'; var cookie = $.cookie(cookieName); if(cookie){ var cookie = cookie.split('|'); $(cookie).each(function(index){ var thisCookieData = this.split(','); if(thisCookieData[0] == id ){ } }); }

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  • How do I return a variable in javascript?

    - by bmckim
    I am working with the google maps API and whenever I return the variable to the initialize function from the codeLatLng function it claims undefined. If I print the variable from the codeLatLng it shows up fine. var geocoder; function initialize() { geocoder = new google.maps.Geocoder(); var latlng = new google.maps.LatLng(40.730885,-73.997383); var addr = codeLatLng(); document.write(addr); } function codeLatLng() { var latlng = new google.maps.LatLng(40.730885,-73.997383); if (geocoder) { geocoder.geocode({'latLng': latlng}, function(results, status) { if (status == google.maps.GeocoderStatus.OK) { if (results[1]) { return results[1].formatted_address; } else { alert("No results found"); } } else { alert("Geocoder failed due to: " + status); } }); } } prints out undefined If I do: var geocoder; function initialize() { geocoder = new google.maps.Geocoder(); var latlng = new google.maps.LatLng(40.730885,-73.997383); codeLatLng(); } function codeLatLng() { var latlng = new google.maps.LatLng(40.730885,-73.997383); if (geocoder) { geocoder.geocode({'latLng': latlng}, function(results, status) { if (status == google.maps.GeocoderStatus.OK) { if (results[1]) { document.write(results[1].formatted_address); } else { alert("No results found"); } } else { alert("Geocoder failed due to: " + status); } }); } } prints out New York, NY 10012, USA

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  • JavaScript, transform object into array

    - by Šime Vidas
    I've got an object: var obj = { "Mike": 24, "Peter": 23, "Simon": 33, "Tom": 12, "Frank": 31 }; I want to create an array that holds the values of the object. The keys (key names) can be disregarded: [24, 23, 33, 12, 31] The order of the values is NOT important! One solution (obviously) would be do have a function that takes the values and puts them into an array: var arr = valuesToArray(obj); I will accept such a function as the answer. However, I would be more pleased if there would be an API function (ECMAScript, jQuery, browser-specific, ...) that could do this. Is there such a thing?

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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 'class' and singleton problems

    - by Kucebe
    I have a singleton object that use another object (not singleton), to require some info to server: var singleton = (function(){ /*_private properties*/ var myRequestManager = new RequestManager(params, //callbacks function(){ previewRender(response); }, function(){ previewError(); } ); /*_public methods*/ return{ /*make a request*/ previewRequest: function(request){ myRequestManager.require(request); //err:myRequestManager.require is not a func }, previewRender: function(response){ //do something }, previewError: function(){ //manage error } }; }()); This is the 'class' that make the request to the server function RequestManager(params, success, error){ //create an ajax manager this.param = params; this._success = success; //callbacks this._error = error; } RequestManager.prototype = { require: function(text){ //make an ajax request }, otherFunc: function(){ //do other things } } The problem is that i can't call myRequestManager.require from inside singleton object. Firebug consolle says: "myRequestManager.require is not a function", but i don't understand where the problem is. Is there a better solution for implement this situation?

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  • JavaScript Regular expressions, match and replace link

    - by Thoman
    Hello please help me <html> <body> http://domainname.com/abc/xyz.zip http://domainname2.com/abc/xyz.zip </body> </html> I want replace with link and out put like <html> <body> <a href="http://domainname.com/abc/xyz.zip">http://domainname.com/abc/xyz.zip</a> <a href="http://domainname2.com/abc/xyz.zip">http://domainname2.com/abc/xyz.zip</a> </body> </html> Great Thank

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