javascript making combination of alt and a key press events.

Question

4.00/5 (1 vote)

See more:

Hello Every One,

I am selecting radio button in grid view on key press from keyboard. I am selecting radio button on selection of 'a' and 'd' key press.
But now i want to make combination of 'alt' key combination with keys 'a' and 'd'.
So give me any idea how can i do this. following is code which i am using to perform key events. But i am not understanding that how can i make combination of alt key with this.

please help me...

<script type="text/javascript">

       document.onkeypress = clickRadio;

       function clickRadio(e) {
           if (window.event)
               var keyCode = window.event.keyCode;       // IE
           else
               var keyCode = e.which;

               if (keyCode == 65 || keyCode == 97 || keyCode == 68 || keyCode == 100) {
                   setRadioButton(keyCode);
               }
       }
       function setRadioButton(whichKey) {}</script>

Posted 26-Jun-12 18:52pm

coolnavjot31

Updated 26-Jun-12 19:38pm

Prasad_Kulkarni

v2

Add a Solution

2 solutions

Solution 1

Try This:

Put This In The Body:

JavaScript

<BODY onload="document.body.focus();" onkeydown="AltDown();">

This Is The Function To Detect The ALT:

JavaScript

function AltDown() {
if (window.event.altLeft) {
alert("altLeft Pressed");
}
else {
if (window.event.altKey) {
    alert("altRight Pressed");
}
}

//To Cancel The Event
window.event.returnValue = false;

document.body.focus();
}

Posted 26-Jun-12 19:31pm

smfarooq

Updated 26-Jun-12 19:37pm

v2

Comments

krumia 27-Jun-12 1:44am

WARNING: shiftLeft, shiftRight, ctrlLeft, ctrlRight, altLeft, altRight properties of window.event are IE only. Consider that if you're using other browsers.

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

krumia · Accepted Answer · 2012-06-26T19:36:00

Solution 2

This is an extract from http://www.w3schools.com/jsref/event_onkeypress.asp[^]

Quote:
The onkeypress event is not fired for all keys (e.g. ALT, CTRL, SHIFT, ESC) in all browsers. To detect only whether the user has pressed a key, use the onkeydown[^] event instead, because it works for all keys.

You can use event.altKey, event.ctrlKey, event.shiftKey predecates to check if respective modifiers are pressed.

Posted 26-Jun-12 19:36pm

krumia

Comments

coolnavjot31 27-Jun-12 2:05am

Hello

I have solved this. you are right i Have solve this by using onkeydown event.
following is my solved code.

<script type="text/javascript">
document.onkeydown = clickRadio;

function clickRadio(e) {

if (window.event)
{
var keyCode = window.event.keyCode; // IE
}
else
{
var keyCode = e.which;
}

if (e.altKey && (keyCode == 65 || keyCode == 97 || keyCode == 78 || keyCode == 110))
{
setRadioButton(keyCode);
}
}
</script>

krumia 27-Jun-12 5:56am

Great to hear that. You can enter your code as a solution here. Please do so. It will be useful for others. And you get some reputation points too.