How expensive are local variables (var v), global variables (window.v) and cross-global variables (parent.v) in JavaScript, in the major browsers? Has anyone performed any good tests on this one?
I'm new to Java and I'm doing a project with Ext JS and Java. I'm using Eclipse Java EE IDE for Web Developers (Build id: 20100218-1602). Can anyone suggest any Javascript debugging plugin for this build? Links appreciated
Hi, i'm pretty new to Javascript and PHP so please bear with me if i'm asking some really dumbed down questions.
Ok, say i need to use values stored in a PHP $_GET or $_SESSION, is it advisable to just do something like
var something = PHP echo $_SESSION or $_GET
I have an HTML table which may contain thousands of rows (number of columns is not a problem here).
I would like to be able to browse this table easily and be able to do the following:
Decide how many rows will be presented
Jump to the next/previous X number of rows
Scroll the table using the scroll bars to any desired line
Be able to customize/extend easily this Javascript/jQuery code
Has anyone seen something similar ?
Thank you very much !
What is the difference (if any) between the javascript strings defined below?
var str1 = "Somestring";
var str2 = 'Somestring';
"" and '' mean two very different things to me predominantly writing code in C++ :-)
EDIT: If there is no difference why are there two ways of achieving the same thing and which is considered better practice to use and why. Thanks!
is there any local file manipulation that's been done with javascript? i'm looking for a solution that can be accomplished with no install footprint like requiring AIR.
specifically, i'd like to read the contents from a file and write those contents to another file. at this point i'm not worried about gaining permissions, just assuming i already have full permissions to these files.
Hello all,
I have a JavaScript variable that I echo out using PHP which is shown like this in the page source:
var db_1 = 'C:\this\path';
When I set the value of a text field with that variable like so:
$('#myinput').val(db_1);
The slashes have disappeared and only the other characters are left!
Why is this and how can I put the slashes back in??
Thanks all
Hello,
Is there a simpler way to rewrite the following condition in JavaScript ?
Thanks !
if ((x == 1) || (x == 3) || (x == 4) || (x == 17) || (x == 80)) {...}
So I'm searching for a good crash course on localstorage and interacting with it in Javascript. I want to build a to-do list webapp with some extra functionality but it would be just for 1 user. I don't want to mess with php/mysql and have the server doing anything. Links to tutorials would be best :-D
Do you have experience with a Javascript templating engine, one that is stable, easy to use and has good performance?
I need to do apply the same template many times for different data. I prefer to download the template itself once (and have it cached) rather than processing the template on the server. Also, this way the template itself would be a static resource more easily cached in the server side too.
Hello,
I have added html controls through javascript, but when the page postback, all of the added controls are lost. Is there a way to retrieve it?
Thanks,
JV
To reduce http request i want to mix multiple jquery plugin's javascript filesa and main jquery file into one.
What things should be considered?
Do we just need to place code from all files into new file one bye one or need to do something more. ?
Is it possible to resize a background image on load using javascript? I don't care about dynamically resizing the image according to window size or anything, I just want to take large images and resize them to a specific width and height so that the full image fits inside a specific layout.
I'm not that good with regular expressions...
I need a JavaScript regular expression that will do the following:
The string can contain letters (upper and lower case), but not punctuations such as éàïç...
The string can contain numbers (0..9) anywhere in the string, except on the first position.
The string can contain underscores (_).
Valid strings:
foo
foo1
foo_bar
fooBar
Invalid strings:
1foo -- number as first character
foo bar -- space
föo -- punctuation ö
Many thanks!
i use this javascript syntax for validating a checkbox...
alert(document.getElementById("ctl00_ContentPlaceHolder1_Chkreg").checked);
if (document.getElementById("ctl00_ContentPlaceHolder1_Chkreg").checked == false) {
document.getElementById("ctl00_ContentPlaceHolder1_ErrorMsg").innerHTML = "please select the checkbox";
document.getElementById("ctl00_ContentPlaceHolder1_Chkreg").focus();
return false;
}
My alert showed me false but my if loop is not working... Any suggestion...
Hey,
I'm having some issues trying to decode some javascript.. I have no idea what kind of encoding this is.. i tried base 64 decoders etc. If you can please help me out with this, here's a fragment of the code:
\x69\x6E\x6E\x65\x72\x48\x54\x4D\x4C","\x61\x70\x70\x34\x39\x34\x39\x3
Any ways I can get plain text from that?
Thanks!
Hi,
Is there anyway in JavaScript which emulate user clicks an anchor?
Mozilla(Firefox ) does not implement that.
https://developer.mozilla.org/en/DOM/element.click
But is there any browser which does?
Hi,
I want to know how can I validate using Javascript that if user has entered any username at the time of creating an account is already present in database and ask user to type any other username?
I'm looking for a light-weight UI toolkit written in Javascript (something like Swing) but I'd rather not use ExtJS because I fear that will slow things down tremendously. Are there any small UI toolkits out there that mainly focus on layouts?
Hey Guys, I was wondering if there is a "maximum" of data a javascript application can store. I guess this is handled by the browser and that each one has it's limitation? Am I guessing right? Wrong? If there isn't a limit, will a page file be created (wouldn't be very secure I guess).
We have javascript files that are environment specific, and so I was thinking of going down the path of creating a generic way to read in an XML (config) file to store different environment specific settings. I was curious to know if anybody else on here does that (or if not, is there a reason why you don't)?
Not sure this is possible, but Looking to write a script that would return the average hex or rgb value for an image. I know it can be done in AS but looking to do it in JavaScript.