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?
Hi, i am detecting images on my webpage with javascript document.images function which returns an rray of images. Is there any way to get the mime type of the image from this since i am not using any extension names on images which are loading?
I have a long task in Javascript that should be performed before the web page content is displayed. During the execution of this task I would like to show an image whose opacity will grow up to 100% (when the task is done).
How this can be achieved ?
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)) {...}
I'm trying to clean some html text with javascript, there are white spaces included before and after some words (text is poorly formatted).
Currently I have this regex:
$("#" + target + " *").replaceText(/([\S][\u05B0-\u05C4]*)/gi, '<span class="marked">$1<\/span>');
This will capture all the non white-space characters and wrap them in a span element, but will not capture spaces between words (I need the span).
How would you solve this?
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.
How do I test to see if links are external or internal? Please note:
I cannot hard code the local domain.
I cannot test for "http". I could just as easily be linking to my own site with an http absolute link.
I want to use jQuery / javascript, not css.
I suspect the answer lies somewhere in location.href, but the solution evades me.
Thanks!
I am not familiar with javascript and I have had some exposure to java but I found a web application that fits the goals of my app perfectly. The owner has provided the source by viewing the source in the html and I was wondering how hard it would be to reuse the code to deploy a similar app.
I have this small JavaScript code which I need some help with:
function doFocus(text) {
if (text.value == "Enter Name") {
text.value = "Student Name -";
}
}
All I need here is when someone clicks on my textbox, the text "Student Name -" should change its color, and should text-align = left. I am looking for the appropriate syntax for something like text.color and text.align.
I have unix timestamps from time zone X which is not known,
the current timestamp(now()) in TZ X is known 1275143019,
how to approach a javascript function so that it can generate the datetime in the users current TZ in the format 2010-05-29 15:32:35 ?
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 was given this chunk of code to place in my html page but I know nothing about javascript so I have no idea where to place it and what kind of tag to place it in.
Can someone please help me.
Thanks
Code:
$('input[type=radio]').change(function() {
$('input[type=radio]').each(function(index) {
$(this).closest('tr').removeClass('selected');
});
$(this).closest('tr').addClass('selected');
});
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
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. ?
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 have a asp.net textbox(textarea which is in a repeater have single texarea for each record which are read only) I have button (open in new window) when i click on it the content of the text area needs to be rendered in a new window using javascript .
I am looking for the best way to augment multiple javascript associative arrays.
For example the following code
a = { "one" : 1, "two" : 2 };
b = { "three" : 3 };
c = { "four" : 4, "five" : 5 };
d = Collect(a,b,c)
Should result in value of d being:
{ "one" : 1, "two" : 2, "three" : 3, "four" : 4, "five" : 5 };
What is the best way to do this?
Hello,
I'm trying to update values from a xml file into textboxes. I have this javascript being called in the Page_Load event
this.Page.ClientScript.RegisterStartupScript(this.GetType(), "Script", sb.ToString(), true);
I click the continue button which does a post back but the values are not updated until I refresh the page again which makes me think the js isn't being run until after the page is returned. I'm wondering how to have the values updated when the page is refreshed after the button postback.
thanks
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
I want to make sure I understand callbacks properly, and javascript timing etc. in general.
Say my code looks like this, is it gauranteed to execute in order?
SetList(); // initilizes the var _list
Some.Code(_list, function(data) {
// update list
});
DoSomething(_list); // operates on _list
I'm learning Javascript right now. Can anybody tell me why the second code block traces a empty path for -launch(this)- but using the first code block it gives me the right path?
"<form action='"+launchwebsite+"/subsite/' method='post' target='_blank' onsubmit='launch(this)'>"
and this not:
"<a onclick='launch(this)' title='launch' class='iblack' /></a></div>"
Best
Uli
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.
does anyone knows how to resize image proportionaly using javascript?, i have tried to modify the DOM adding attributes height & Width on the fly, but seems did not work on IE6