What's Wrong With KeyCode And String.fromCharCode
Feb 27, 2006
I got this (piece of) script from 'DHTML Utopia - Modern Webdesign - Using Javascript & DOM'.
function aKeyWasPressed(e) {
if (window.event) {
var key = window.event.keyCode;
} else {
var key = e.keyCode;
}
alert('You pressed the key: ' + String.fromCharCode(key));
}
It is example of adding an eventlistener to a textarea. The events works alright, but when I press 'a' the alert gives me 'A', when I press Ǝ' I get 'h', when I press Ɔ' I get ''', when I press 'à' I get Ɔ', .... Has probably something to do with the fact that I don't live in the UK or
USA. But it shouldn't matter; a key is a key.
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Jul 20, 2005
I have tried to write a wait function but it seems like it will not brake the while loop. I tried two different solutions. Can anyone tell me what I am doing wrong, and come with another suggestion? If I call the function like this: wait(500); it should wait 500ms right?
function wait(time) {
while(1){
setTimeout("break;",time);
}
}
function wait(time) {
var flag=0;
while(flag=0){
setTimeout("flag=1;",time);
}
}
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Aug 22, 2007
This is quite mysterious. I have several list items like this:
HTML Code:
<li>Private</li>
I am looping through them all trying to get the text inside each list item for a comparison with a string from elsewhere.
Javascript Code:
var coresubmenu = document.getElementById('core').getElementsByTagName('li');for (var i = 0; i < coresubmenu.length; i++) { coresubmenu[i].onclick = function() { if (this.firstChild.nodeValue == 'Private') { // fail } alert(this.firstChild.nodeValue.length); // alerts 8 }}
IE alerts one more than the actual length in all cases. Google hasn't brought anything up for me on this one - any ideas?
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Feb 15, 2011
href="javascript:void(null);"
the same as
href="javascript:void(0);"
if not whats the preferred or standardized use to avoid conflict..
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Jan 6, 2010
i am using netbean to develop a registration form.As this i want to know what is the coding to check input of text, integer, email , so i can restrict what they input..
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Oct 23, 2010
I need to get the object that was just clicked, to insert into a JavaScript function. I've tried "function('this')" and similar things, but it doesn't work.
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Jul 20, 2005
I have 3 select pulldown boxes where a user will select a year (either
2002 or 2001), a week (one thru 52), and a database (short data or long
data). But if a user selects a week that is less than 4, the 3rd select
pulldown will only show the choice of "short data", as they will not be
able to select "long data". Is it dynamically possible in javascript to
program a third pull down in this fashion?
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Apr 3, 2009
how to achieve the same affect with the code pmw helped me with several months ago this time around im trying to achieve the same affect instead of displaying one image im wanting to display text but stuff like this depending on what is selected once again it will display the following.the url for this is once again here.how much space,bandwidth,ram for gaurantee and burstable ram and ips etc.. now how can i do this using the following code below.
PHP Code:
?>
<script type="text/javascript">
document.getElementById('plan').onchange = updateRacquetImage;[code].....
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Mar 28, 2009
So I have a nice little hand rolled Ajax call to my server pulling a list from the database and displaying it in a drop down list dependant on the user input. Aka Google suggest. I am wondering if the quickest way to do this is to call the database each time with Ajax and search the results with the input, or to write an xml from the database and search that. Then when the Database is updated rewrite the xml file.
Am I underestimating MYSQL again? Or not, and I feel it would be good practice to write the xml file because it will essentially mean a lot less database calls. But I don�t know how fast searching an xml file would be in comparison to a db call. The results from the database are say 500 entries anywhere between 10 - 100 characters each. I want to know A. The best way to do this B. Lets say the site will have pretty high traffic so I am looking for it to be as tweeked as possible. I can test but thought at the end of my week it was worth seeing what peoples advice is.
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Nov 17, 2005
The keyCode of '&'=55 and the keyCode of ƍ'=55 also...
How can you know what a person typed if you get the same keyCodes?
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Oct 5, 2009
keyCode and which will get the same value, so anything different?
<script>
$(function() {
$(window).keydown(function(e) {
console.log(e.keyCode);
console.log(e.which);
});
});
</script>
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Oct 20, 2005
I'm trying to figure out what key the user pressed using a Danish
keyboard layout. charCodeAt returns the correct number, but
event.keyCode returns a wrong number, when using one of the keys that
are different on a Danish keyboard layout. "-" returns 45 and 189
respectively. Etc. (The input-field in the sample code below displays
the right character).
I've tried setting the lang-parameter to 'da', but it doesn't make a
difference.
sample code:
<input type="text"
onkeyup="alert(this.value.charCodeAt(this.value.length-1));alert(window.event.keyCode);">
Am I missing something, or is the event.keyCode in IE hardcoded to an
english keyboard layout? Is there a way to automatically convert the
event.keyCode so it corresponds with the users keyboard?
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Oct 21, 2005
I want to overwrite the CTRL+S key via 'onkeypress' so, that the
browser doesn't recognize it as 'Save page as ..' command.
I assumed, that calling 'evt.preventDefault()' in my event-handler
would be sufficient. It isn't.
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Jul 20, 2005
I have:
<div onkeypress="go(event)">...</div>
and:
function go(event) {
alert(event.keyCode);
}
but I always get 0 for the keycode.
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Sep 15, 2009
I have a 3 textareas that when the user presses the spacebar I would like for the code to execute a TAB to move between them instead. My code works if I make the replacement keycode an number or letter but it wont work if I use TAB. The browser is IE. code...
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Mar 7, 2006
Basically we are trying to simulate the tab key when the
down arrow key is pressed. (we know there are other way
to control focus flow but we use a lot of dynamic jsp fields,
that will make the flow control a nightmare, we just want
basic tabbing from the arrow key)
1)We are able to capture a onkeydown event and reasign it with another
key value with no problem within an html document without a form.
example:
var ieKey = event.keyCode;
if (ieKey == 40) {
event.keyCode = 9;
}
however as soon as we insert a form tag in the document, this stops
functioning. The asignment seems to be fine as an alert clearly shows, but the
instruction seems to be ignored. Code:
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Jul 12, 2010
$(document).keydown(function(e) {
console.log('key code is: 'e.which);
});
I know how to find out which key user use, but how to do it when they use combination key? for example: "CTRL + C", "CTRL + V" and so on.
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Apr 15, 2011
I have a requirement to force the pageUp and pageDown keys to function the same as the arrowUp and arrowDown. I believe I'm ok with IE but have issues with setting the value for FireFox ...specifically line: evt.which=38; and line evt.which=40; -the "which" seems to only have a getter-
try{
if (window.document.addEventListener) {
window.document.addEventListener("keydown", reviseKeyFunctions, false);
}else{
[Code]....
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Jan 8, 2010
I have an input field with onkeyup event that displays the code of the key the user pressed. The thing is, this works for all the keyboard buttons except for the ENTER key.
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Jan 7, 2010
the working code is : $(document).keydown(function(event)and I found out that it's not working on Firefox only on IE and Google Chrome...
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Aug 8, 2011
How come this code ...
$(document).keypress(function(event) {
console.log(event.keyCode);
});
returns 0 after pressing the key 'a' in FireFox but 97 in Chrome?
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Mar 25, 2011
i want to handle keyboard and want to replace keycodes like when user enter / press key a = 65 I may able to change and show in textbox b= 66.
[Code]...
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Mar 11, 2010
I am trying to retrieve the keycode that was pressed while an input is selected. Here is my code:input.onkeyup = function() { func( this, event ); }
function func( obj, e ) {
alert(e);
...
}
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Sep 7, 2005
Here is an answer for those who are looking for a keystroke evaluation
script that works in Internet Explorer (IE 5.5, 6.0, 7.0 for PC--IE
4.0, 5.2 for Mac), Mozilla Firefox (Windows, Linux, and Apple
Macintosh), Safari, Opera, and other off-brand web browsers.
I have gone through many groups trying to find code that didn't break
in Firefox--yet still worked in other browsers. Although many people
give input on this topic, few are correct in their handling of the
events to give the correct results across the board.
I am a Webmaster, and although I have worked with much JavaScript, I do
not claim to be an expert on this topic--so feel free to post any
improvements that you can make.
Here's the test code, this snippet designed to force numeric-only input
in any browser, with the exception of a couple keys that are still
needed for form navigation (such as Tab--although this can be tailored
to your needs by adding more exceptions):
---SNIP_01---
<script language="JavaScript">
function CheckNumericKeyInfo($char, $mozChar) {
if($mozChar != null) {// Look for a Mozilla-compatible browser
if(($mozChar >= 48 && $mozChar <= 57) || $mozChar == 0 || $char ==
8 || $mozChar == 13) $RetVal = true;
else {
$RetVal = false;
alert('Please enter a numeric value.');
}
}
else {// Must be an IE-compatible Browser
if(($char >= 48 && $char <= 57) || $char == 13) $RetVal = true;
else {
$RetVal = false;
alert('Please enter a numeric value.');
}
}
return $RetVal;
}
</script>
---END_01---
This function would then be called as follows:
---SNIP_02---
<input type="text" name="over_figure" id="over_figure" size="5"
onKeyPress="return CheckNumericKeyInfo(event.keyCode, event.which);"
value="">
---END_02---
I have personally tested this on PC, Mac, and Linux systems in every
Web browser that I can get my hands on. It's far easier than the other
scripts that I've found, and you can just add "alert('keyCode: ' +
$char)" to find any other keycodes you might want to allow if you don't
know them off-hand. Obviously there is room to add a larger exception
list if you have need of it, and it might be better to just set $RetVal
to TRUE in the else and add an else if for IE, but my use didn't
require it.
I hope it saves someone some time!
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May 5, 2011
I must be writing this wrong.
<script type=text/javascript >
$(document).ready(function() {
if(event.charCode || event.charCode !==13) {
[code]....
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Jun 10, 2010
I am trying to use the jquery keydown event.I wan to fade in a div that is a form then when the user presses keycode 17 meaning control key this div and form will fade in at the center of the screen.here is the code I have:
<html>
<link rel="stylesheet" type="text/css" href="/home/main.css"/>
<script type="text/javascript" src="http://www.domain.com/pngFix/jquery-1.3.2.min.js"></script>
<script type="text/javascript"[code]...
This is in a php file and echoing the code. So the " " ignore it it's just saying to php that those are to be echoed as " " This code isn't working. I would press control key but no fade in occurs. I include this php file to all my websites webpages which are php files.
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