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  • Trigger button click with JavaScript on Enter key in Text Box

    - by ziondreams
    I have one text input and one button (see below). How can I use JavaScript to trigger the button's click event when the Enter key is pressed inside the text box? There is already a different submit button on my current page, so I can't simply make the button a submit button. And, I only want the enter key to click this specific button if it is pressed from within this one text box, nothing else. <input type="text" id="txtSearch" /> <input type="button" id="btnSearch" value="Search" onclick="doSomething();" /> Update: I'd like to accept my own answer below, but since that is now allowed I will accept the next best solution.

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  • JavaScript constructors inside a namespace

    - by Joe
    I have read that creating a namespace for JavaScript projects helps to reduce conflicts with other libraries. I have some code with a lot of different types of objects for which I have defined constructor functions. Is it good practice to put these inside the namespace as well? For example: var shapes = { Rectangle: function(w, h) { this.width = w; this.height = h; } }; which can be called via: var square = new shapes.Rectangle(10,10);

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  • Javascript src starts with //?

    - by Chris
    I'm starting to see more and more script references show up like so: <script type="text/javascript" src="//somedomain.com/somescript.js"></script> Note the lack of http: at the beginning of the src attribute. It seems to work fine and avoids the messy requirement of detecting http vs https, but I've never actually seen this uri format referenced anywhere. Where did it come from? Is this behavior documented anywhere? Is it guaranteed to work in any browser?

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  • JavaScript closures in for-loop

    - by user1656447
    As explained here http://www.mennovanslooten.nl/blog/post/62/ code below outputs result just for "5x5" forgetting about anything before that. for (x = 1; x <= 5; x++) { for (y = 1; y <= 5; y++) { var cords = x+"x"+y; var el = document.getElementById(cords); el.addEventListener("click", function (e) { B_modeWindow('1', cords); }); } } As far I have the informations (blog link provided above) can't figure out how to alter showed code to fix it. How to walk around this code with JavaScript closure in my for-loop?

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  • Map browser DOM using Javascript

    - by EddyR
    I'm trying to map a browsers DOM using javascript. It should list all the functions and attributes associated with it and it should also recurse through any object attributes. Now as I understand it 'window' is the most top-level node (although I've see a reference to 'top' as well in Chrome.) then 'document', etc. However I've never seen 'Node' under 'window' and yet I can call it. So where is 'Node' located? Is there a level above 'window' or is it a separate object (W3C says it's supposed to be inherited by 'document' only.)? I've been playing with a function to do this but I keep getting weird results so I'm not post it here. Alternatively - is it possible to get the properties from the object types instead of the object reference itself? for example 'DOMWindow' instead of 'window'. I think this would stop duplicating data from inherited objects.

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  • Finding an asp:button and asp:textbox in Javascript

    - by Andrew
    What I'm trying to do is get an asp:button to click. The only problem is that it is within a few tags. Example: <loginview> <asp:login1> <logintemplate> //asp:textbox and asp:button are located here. </loginview> </asp:login> </logintemplate> So how would I get javascript to point to that location so that I can manipulate it. For example, get the button to click.

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  • Validating a text box value using javascript

    - by swathi
    Hi all, I have a textbox.The user will be entering entering a number in this box.The user should enter two digits followed by a period "." and another digit.It would look something like 22.3 or 00.5 or 01.2. If the textbox is not empty,I want to enforce a function which validates the value entered by the user(and gives them an alert if the value entered is not according to the format mentioned above) .This function needs to be triggered when the textbox loses its focus.I am not sure how to go ahead in writing this function as i am still new to this. Any help would be appreciated.Thanks in advance. p.s This function should be triggered each time there is a change in the value.Like suppose, the user enters a value 22, then when the textbox loses its focus,the javascript function should be triggered giving them an alert asking the user to change it to the accepted format which is 22.0.The function should be triggered again when the textbox loses its focus(after the change has been done).This time there would not be an alert since the user entered it in the right format.

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  • FOR loop performance in Javascript

    - by AndrewMcLagan
    As my research leads me to believe that for loops are the fastest iteration construct in javascript language. I was thinking that also declaring a conditional length value for the for loop would be faster... to make it clearer, which of the following do you think would be faster? Example ONE for(var i = 0; i < myLargeArray.length; i++ ) { console.log(myLargeArray[i]); } Example TWO var count = myLargeArray.length; for(var i = 0; i < count; i++ ) { console.log(myLargeArray[i]); } my logic follows that on each iteration in example one accessing the length of myLargeArray on each iteration is more computationally expensive then accessing a simple integer value as in example two?

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  • How to split strings at specific intervals to arrays in javascript

    - by t3st
    how to split strings at specific interveals to arrays in javascript for example: split this string into 4 characters (including space and characters) this is an example should be split,numbers(123),space,characters also included to this ------> 1st array is ------> 2nd array an ------> 3rd array exam ------> 4th array ple ------> 5th array shou ------> 6th array ............ etc till..... ..ed ------> last array

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  • How to check for undefined or null variable in javascript

    - by Thomas Wanner
    We are frequently using the following code pattern in our javascript code if(typeof(some_variable) != 'undefined' && some_variable != null) { // do something with some_variable } and I'm wondering whether there is a less verbose way of checking that has the same effect. According to some forums and literature saying simply if(some_variable) { // do something with some_variable } should have the same effect. Unfortunately, Firebug evaluates such a statement as error on runtime when some_variable is undefined, whereas the first one is just fine for him. Is this only an (unwanted) behavior of Firebug or is there really some difference between those two ways ?

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  • Javascript hasOwnProperty does not work under Google Chrome

    - by WebRookie
    I am currently working with some help and it has been going well, until this incident. function runCommand(commandString) { commands = new Object(); commands.clear = function(){ $('#terminal').html('') } parameters = commandString.split(" "); command = parameters.shift(); if( commands.hasOwnProperty(command)){ commandscommand; } else { $('#terminal').append(command+' command not recognized.'+''); } } The person who was helping me made this function, so I could run the "terminal-like" browsers that I needed to work on. It works fine when using Firefox, heres an example: guest@shell:/$ sudo make me sandwich sudo command not recognized. guest@shell:/$ clear *clears* guest@shell:/$ clear But under google chrome this happen: guest@shell:/$ sudo make me sandwich sudo command not recognized. guest@shell:/$ clear clear command not recognized. I believe that it has something to do with "commands.hasOwnProperty(command)" that is preventing it from working properly. I am using JQuery the javascript library to build the website, and I need to know how to solve this problem, or an alternative.

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  • pass parameter from javascript to another jsp

    - by gautam
    I want to pass parameter from a Javascript function to another JSP page. Currently I am doing like this: function viewapplet(strPerfMonPoint) { var dateSelected = document.forms[0].hdnDateSelected.value; document.forms[0].hdnPerfMonPoint.value = strPerfMonPoint; var win; win = window.open("jsp/PopUp.jsp?GraphPerfMon="+strPerfMonPoint+"&strDateSelected="+dateSelected, strPerfMonPoint,"width=800,height=625,top=40,left=60 resizable=No"); } I added hdnPerfMonPoint hidden variable and tried to acces in PopUp.jsp using request.getparameter(hdnPerfMonPoint) but it is giving null. I want my window.open like: window.open("jsp/PopUp.jsp", strPerfMonPoint,"width=800,height=625,top=40,left=60 resizable=No"); Please suggest solution.

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  • Javascript Closure question.

    - by Tony
    Why the following code prints "0-100"? (function () { for ( var i = 100; i >= 0; i -= 5) { (function() { var pos = i; setTimeout(function() { console.log(" pos = " + pos); }, (pos + 1)*10); })(); } })(); I declare pos = i , which should be in a descending order. This code originated from John Resig' fadeIn() function in his book Pro javascript techniques.

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  • (Re)Enabling JavaScript debugger in IE7 with Visual Studio 2008

    - by masterik
    Visual Studio 2008 comes with nice javascript debugging features. But I have played a little with NetBeans debugger wich has installed an ugly Script Debugger from Microsoft to my IE... Normally IE should ask what do I want to use for debugging, but now I can't start debugging with Visual Studio, the Script Debugger is started automatically... After uninstalling the Script Debugger I can't debug in IE at all. Even attaching to iexplore.exe process doesn't helps... Has installed the Script Debugger again... :((((( How can I get back my Visual Studio debugging working in IE again?

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  • javascript traversing table

    - by user234194
    If I have a certain code, How do I traverse or get to the button(i.e type == INPUT) in JavaScript. <td> <div> <script></script> <script></script> <script></script> <input type="button"....../> </div></td> I tried doing: var cell = row.cells[0]; if (cell) { var btn1 = cell.firstChild; alert(btn.tagName.toUpperCase()); this resulted "DIV", and var cell = row.cells[0]; if (cell) { var btn = btn1.firstChild; alert(btn.tagName.toUpperCase()); this resulted "SCRIPT" But doing same (i.e firstChild ) , I could not succeed. Any help is appreciated. Thanks

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  • JavaScript + HTML textbox problem!

    - by Alpjef
    i'm trying to get the value of 2 textboxes with Javascript. textbox 1, nothing wrong. textbox 2, same code, there happends nothing!!!!!! here is the code var fieldname; fieldname = document.getElementById("div"+field).getAttribute("field"); alert(fieldname); // RETURNS "Birthdate" var textval; textval = document.getElementById("textfield"+field).value; alert(textval); // RETURNS NOTHING var field is the id of the textbox and div. Why isn't this working???

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  • 404 detection in JavaScript

    - by Vadim
    In my JavaScript I'm trying to redirect to third party page. It can open a page either in a new window or inside a frame depends on a user settings. Something like this: if (newWindow) { window.open(url, targer); } else { theFrame = url; } What I want to do is to display my custom page in case a third party site is down or page is unavailable. Basically in case of 404 error. What's the best way to solve this problem?

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  • is it possible to evaluate JavaScript code using XMLHttpRequest

    - by user1064717
    I'm trying to use this ajax request to call a file with some php which is working ok and some JavaScript which is not. any ideas? function showpart2(){ if(window.XMLHttpRequest){ xmlhttp = new XMLHttpRequest(); xmlhttp.open("GET","atuamae.org/parte2-encomendar.php",false); xmlhttp.send(null); } document.getElementById('part2').innerHTML = xmlhttp.responseText; eval(xmlhttp.responseText.getElementById('part2').innerHTML) setTimeout('showpart2()',15000); } showpart2(); </script>

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  • Javascript eval limits

    - by user117701
    Is there a limit to javascript's eval, like in lenght? I'm trying to build an app where you can store JS code in the DB, which you can later load and eval in order to execute it, but i'm reaching a limit. First of all, the code has to all be in one line. Any multiline statements are not executed. Next, i'm reaching a limit in length (i guess). If i execute the code manually, it works, but put that same code in the db, load it via ajax, and try to execute it, and it fails. Any ideas why?

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  • Passing a variable to javascript via a link.

    - by Jon
    My website has a javascript variable (addselectedsubdivision) that loads a neighborhood name from a box on the left to a box on the right. I was hoping I could build a link and then us PHP to add the subdivision letter, neighborhood, and city so that when you click on the link it goes right to this page and loads the neighborhood name in the box on the right. However, I can't get the variable to pass to the new page. Any suggestions? Website: http://www.mlsfinder.com/va_rein/jonmcachran/index.cfm?primarySearchType=sold&searchType=subdivision&so=a&domain=www.jonsellsvb.com&subdivision_string=p Example link: <a href="http://www.mlsfinder.com/va_rein/jonmcachran/index.cfm?primarySearchType=sold&searchType=subdivision&so=a&domain=www.jonsellsvb.com&subdivision_string=$firstletter" onLoad="addselectedsubdivision($neighborhood||$city);" target="_blank">

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  • JavaScript's Associative Array / Object can't be read in functions

    - by Matrym
    At the very beginning of the javascript file, I have: var lbp = {}; lbp.defaults = { minLength: 40 }; I can successfully alert it afterwards, with: alert(lbp.defaults.minLength); But as soon as I put it inside a function, when I alert, I get "Undefined". What gives, and how do I avoid this? Is it absolutely necessary to pass this variable into each function, for example, by doing: function(lbp) { alert(lbp.defaults.minLength); } I would have thought that defining it first, it would attain global scope and not be required to be passed in? Thanks in advance for enlightening me :)

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  • help with converting javascript function to php

    - by Haroldo
    My javascript isnt so great, but i found a brilliant looking function here I'm not sure what to do with this bit: var ranges = [], rstart, rend; full function: function getRanges(array) { var ranges = [], rstart, rend; for (var i = 0; i < array.length; i++) { rstart = array[i]; rend = rstart; while (array[i + 1] - array[i] == 1) { rend = array[i + 1]; // increment the index if the numbers sequential i++; } ranges.push(rstart == rend ? rstart+'' : rstart + '-' + rend); } return ranges; } getRanges([2,3,4,5,10,18,19,20]); // returns ["2-5", "10", "18-20"] getRanges([1,2,3,5,7,9,10,11,12,14 ]); // returns ["1-3", "5", "7", "9-12", "14"] getRanges([1,2,3,4,5,6,7,8,9,10]) // returns ["1-10"]

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  • namespacing large javascript like jquery

    - by frenchie
    I have a very large javascript file: it's over 9,000 lines. The code looks like this: var GlobalVar1 = ""; var GlobalVar2 = null; function A() {...} function B(SomeParameter) {...} I'm using the google compiler and the global variables and functions get renamed a,b,c... and there's a good change that there might be some collision later with some outside code. What I want to do is have my code organized like the jquery library where everything is accessible with $. Is there a way to namespace my code so that everything is behind a # character for example. I'd like to have this to call my code: #.GlobalVar #.functionA(SomeParameter) How can I do this? Thanks.

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  • Maximizing the current window in javascript

    - by user349134
    Is there a way I can maximize a currently minimized window from Javascript? Here's my situation: I have a series of links that all target the same external window (e.g. "MyNewWindow"). When I click a link, a new window pops up. If I click another link, the page pops up in the same window as expected. If I minimize the "MyNewWindow" popup, I'd like to be able to click another link and have that window maximize. My approach was to put something on the onLoad part of the body so that when the page is refreshed it will automatically "maximize" if it is minimized. Note: Using window.MoveTo() and window.resizeTo() doesnt seem to do the trick (the window stays minimized). Thanks!

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  • Dynamically generating a file with javascript?

    - by gct
    I'm working on a web app for my company that will let us do some image tagging stuff, and I'd like to be able to generates results in the form of a CSV file. I can do this easily enough by dumping the CSV data to a div or something on the page and having the user copy it out. I'd rather have them hit the a generate button and have a CSV file downloaded as though they clicked on a link to the result, so they can more easily just save the file somewhere convenient. Is it possible to simulate this kind of thing with javascript? I basically want to dynamically generate the file and then let them download it, client side.

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