Develop Reference

javascript onkeydown not working in numeric keypad

I am having a problem while entering the number values from the Num pad.My script is only accepting numbers from the number keys above the 'qwerty' keys. What I want is that user can also enter numbers from numeric keypad. Following is the HTML:
<td style="border: 1px solid #ddd;background-color:#E5E4E2;">
<input type="text" name="qty_enter[]" id="qty_enter0" onkeyup="sum(0),itc_details(0),prevent_zero(0),advance_seeting1();" onkeypress="copyValue2(1)" onkeydown="return isNumberKey(event)" style="width: 65px;outline: none;border: none; background: transparent;"/>
</td>
However I tried to call the script on onkeypress and onkeyup functions but it's not working because I have already called function over there. Here is the script below for only accepting numerical values.
Also I have double checked the Num Lock and that's not the issue.
<script>
function isNumberKey(evt)
{
var charCode = (evt.which) ? evt.which : event.keyCode
if (charCode != 46 && charCode > 31
&& (charCode < 48 || charCode > 57))
return false;
return true;
}
</script>
Any help would be appreciated. Thank you.

Because numlock numbers keycode is different normal number keys.
Ex keycode 48=number 0, when Numlock 0 = keycode 96;
Look this article .
function isNumberKey(evt){
var charCode = (evt.which) ? evt.which : event.keyCode
console.log("KeyCode: "+charCode);
if (charCode >= 96 && charCode <= 106 )
console.log("Numlock number detected: "+charCode);
}
<td style="border: 1px solid #ddd;background-color:#E5E4E2;">
<input type="text" name="qty_enter[]" id="qty_enter0" onkeydown="isNumberKey(event)" style="width: 65px;"/>
</td>

Your function is actually written to block the num pad from entering any key.
Reverse the return false with true and vice versa to enable nums but disable letters and everything else.

Hey I got answer for my question after 3-4 days long. Script was ok. It was pretty simple I just changed event as shown in below.
<input type="text" name="qty_enter[]" id="qty_enter0" onkeyup="sum(0),itc_details(0),prevent_zero(0),advance_seeting1();" onkeypress="return isNumberKey(event)" onkeydown="copyValue2(1)" style="width: 65px;outline: none;border: none; background: transparent;"/>

How to change specific ASCII Charfacter to space character before submit a form

I have the below code to recognize the special ASCII codes before submit the form. How can I set condition to change that ASCII codes with character space? For example, I don't want the user enter ; and I want to change this character with space.
Here is my code :
function isNumberKey(evt) {
var charCode = (evt.which) ? evt.which : event.keyCode
if (charCode > 31 && (charCode < 48))
return true;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<form method="post" action="#">
<input name="mastername" type="text" onkeypress="return isNumberKey(event)">
<input type="submit" value="submit">
</form>

html multiple functions for "onkeypress" attribute

I have this HTML text input as below
<label style="color: white;" for="id">ID:</label>
<input type="text" onkeypress="return event.charCode >= 48 && event.charCode <= 57" maxlength="9" name="id" id="id">
Now, in the onkeypress I successfully added so only numbers can be entered.
but I have a JavaScript function called:
function checkID() {
and I want that additionally, after every number entered it will call this function. But I just can't get it to do them both (only allow numbers and call the function).
Thanks in advance! Itay.

You can enter the number validation to the checkID function.
<input type="text" onkeypress="return checkID(event,this)" maxlength="9" name="id" id="id">
function checkID(e,elem) {
if !(e.charCode >= 48 && e.charCode <= 57)
return false;
// continue checking the id...
}

Alternatively to attaching your function via html, you can add it using purely javascript:
document.querySelector("your-html-selector").addEventListener("keypress", function(event) {
// all your code here
});
This keeps your html clean and your code easy to read, especially if you're trying to execute multiple functions and such on an event occurring.

Input formatting

I'm using an input type="number"to allow users to put a duration time on a post. The format is days hours:minutes:seconds as the backend provides the format.
What I need to do is to give that format to the input. Is this possible?

You can use input type text with pattern:
<form>
<input type="text" pattern="^\d{1,3} \d{1,2}:\d{1,2}:\d{1,2}$" placeholder="days hours:minutes:seconds"/>
<input type="submit"/>
</form>
It will validate the text using 1-3 digits for days and 1-2 for hours minutes and seconds.
You can also restrict typing of no digits and colons and space using jQuery:
$(function() {
$('input').keydown(function(e) {
console.log(e.which);
if (!((e.which >= 48 && e.which <= 57) || (e.which == 186 && e.shiftKey) || e.which == 32)) {
return false;
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
<input type="text" pattern="^\d{1,3} \d{1,2}:\d{1,2}:\d{1,2}$" placeholder="days hours:minutes:seconds"/>
<input type="submit"/>
</form>

If you have jQuery, then take a look at:
http://jonthornton.github.io/jquery-timepicker/

you can use also
<input type="datetime">

Which event should be used on text box to call javascript function?

I'm having two text boxes to store two dates. I want to call a javascript function upon entering date into the first and second textbox. That is as soonas I enter the date in second box I want to call the javascript function. I tried onchange but it is not calling the javascript function. Can you suggest me the right event to call the javascript function? Thanks in advance. I'm using smarty. My code is as follows:
<label>Created Date From</label>
<div class="form-element">
<input type="text" class="cal fl-left" name="from_date" id="frmDate" value="{if $data.from_date}{$data.from_date}{else}{/if}" maxlength="10" />
</div>
<label>Created Date To</label>
<div class="form-element">
<input type="text" class="cal fl-left" name="to_date" id="toDate" value="{if $to_date}{$to_date}{else}{/if}" maxlength="10" onchange="get_tests_by_date(); return false;"/>
</div>
Javascript code is as follows:
function get_tests_by_date() {
document.location.href = "view_tests.php?test_category_id="+document.getElementById('test_category_id').value+"&test_mode="+document.getElementById('test_mode').value+"&test_type="+document.getElementById('test_type').value+"&package_type="+document.getElementById('package_type').value+"&created_date_from="+document.getElementById('frmDate').value+"&created_date_to="+document.getElementById('toDate').value+"&page=1";
}

This is what i ended up doing years ago, no jquery in this code:
HTML:
<input name="FormStartDate" value="" maxlength="10" onkeydown="KeyDateNumCheck()"/>
<input name="FormEndDate" value="" maxlength="10" onkeydown="KeyDateNumCheck()"/>
JS:
//do not allow to input anything except the numeric characters, dashes, or slashes
function KeyDateNumCheck()
{
var iKeyCode = event.keyCode;
if ( (iKeyCode != 109) && (iKeyCode != 189) && (iKeyCode != 111) && (iKeyCode != 191) &&
( ((iKeyCode > 57)&&(iKeyCode < 96)) || (iKeyCode > 105) || (iKeyCode == 32)) )
event.returnValue = false;
}