Develop Reference

How to allow spanish letters in javascript

Here I have a text box and I want to allow spanish vowels such as ¨áéióú¨ and all spanish letters. I have return the javascript function as follows.
if ((key > 64 && key < 91)|| (key > 159 && key < 166) || (key > 96 && key < 123) || (key == 165) ||(key == 32)
|| (key == 164) || (key == 130) || (key == 181) || (key == 144) || (key == 214) ||
(key == 224) ||(key == 233) || (key == 8) || (key == 241) || (key == 209)) {
}else{
event.preventDefault();
}
I have allowed the ñ and Ñ Beacuse Those letters are present in Keyboard. So I debugged the code And I found the keycodes and I allowed them. For the other letters I canot able to find the keycodes. Can any one help me to find the keycodes for the spanish letters
.

Just restrict only letters that you don't want to allow present in your keyboard. If you enter other than that letters it will be allowed

jQuery replace comma with dot doesn't work

I have tried to append the code from another post which works perfectly on fiddle on this link: http://jsfiddle.net/WfpEu/51/
The code replaces comma "," as soon as the user types it and turns it to dot "."
$.fn.ForceNumericOnly = function() {
return this.each(function() {
$(this).keydown(function(e) {
if(e.keyCode==188 || e.keyCode==110 || e.keyCode==108){
e.preventDefault();
$(this).val($(this).val() + '.');
}
var key = e.charCode || e.keyCode || 0;
return (key == 8 || key == 9 || key == 46 || key == 110 || key == 188 || key == 190 || (key >= 35 && key <= 40) || (key >= 48 && key <= 57) || (key >= 96 && key <= 105));
});
});
};
$(".item").ForceNumericOnly();
I have tried to append it to my code here http://jsfiddle.net/p2Hbm/104/ and it doesn't work as it should and i don't know what is wrong. I can't write letters in input fields which is good but also i can't write comma "," it doesn't show up at all.

You need to add the itemclass to your input fields.
Working fiddle: http://jsfiddle.net/p2Hbm/106/

How to allow only defined characters as input using jQuery?

How do i allow special characters such as hyphen,comma,slash,space key,backspace key,delete key along with alphanumeric values and restrict the rest in jQuery?
As this criteria(allowed characters/input values) varies from field to field, i would like to make it as a utility method which accepts input field id and allowed characters as parameters.
for example: limitCharacters(textid, pattern)

​You can just check the keyCode on keydown and run preventDefault() if match:
$('input').keydown(function(e) {
if (e.which == 8) { // 8 is backspace
e.preventDefault();
}
});​
http://jsfiddle.net/GVb6L/
If you need to restrict to certain chars AND keyCodes + make it into a jQuery plugin, try something like:
$.fn.restrict = function( chars ) {
return this.keydown(function(e) {
var found = false, i = -1;
while(chars[++i] && !found) {
found = chars[i] == String.fromCharCode(e.which).toLowerCase() ||
chars[i] == e.which;
}
found || e.preventDefault();
});
};
$('input').restrict(['a',8,'b']);​
http://jsfiddle.net/DHCUg/

I did something like this but in jQuery plugin format. This example will only allow numbers and full stops.
You can call this by writing:
$("input").forceNumeric();
And the plugin:
jQuery.fn.forceNumeric = function () {
return this.each(function () {
$(this).keydown(function (e) {
var key = e.which || e.keyCode;
if (!e.shiftKey && !e.altKey && !e.ctrlKey &&
// numbers
key >= 48 && key <= 57 ||
// Numeric keypad
key >= 96 && key <= 105 ||
// comma, period and minus, . on keypad
key == 190 || key == 188 || key == 109 || key == 110 ||
// Backspace and Tab and Enter
key == 8 || key == 9 || key == 13 ||
// Home and End
key == 35 || key == 36 ||
// left and right arrows
key == 37 || key == 39 ||
// Del and Ins
key == 46 || key == 45)
return true;
return false;
});
});
}

I would suggest using David solution for modifier keys like backspace and delete and this code below for characters:
var chars = /[,\/\w]/i; // all valid characters
$('input').keyup(function(e) {
var value = this.value;
var char = value[value.length-1];
if (!chars.test(char)) {
$(this).val(value.substring(0, value.length-1));
}
});
Also, I've experienced some problems with keydown so I'd do it on keyup.
Demo: http://jsfiddle.net/elclanrs/QjVGV/ (try typing a dot . or semicolon ;)

jquery - Numeric Only Text Field

I found this very short clean code to only allow numeric chars in a text field. Currently it only covers numbers 0-9 and backspace and delete. I wanted it to also include decimal/period, so I have been fighting with this to simply include keycode 110 and/or 190. I can not get it to work. Can anyone see what I am doing wrong?
$(document).ready(function() {
$('input.numberinput').bind('keypress', function(e) {
return ( e.which!=8 && e.which!=0 && (e.which<48 || e.which>57) ) || (e.which!=110) ? false : true ;
});
});
jsfiddle here: http://jsfiddle.net/justmelat/EN8pT/
html
<div class="label">Enter a number:</div>
<input type="text" name="txtNumber1" id="txtNumber1" value="" class="numberinput" />
<div class="label">Enter a number:</div>
<input type="text" name="txtNumber2" id="txtNumber2" value="" class="numberinput" />
</div>

Try:
$(document).ready(function () {
$('input.numberinput').bind('keypress', function (e) {
return !(e.which != 8 && e.which != 0 &&
(e.which < 48 || e.which > 57) && e.which != 46);
});
});​
JsFiddle: http://jsfiddle.net/EN8pT/1/

With the above answer you can still do 0.23.12.33 which is not a valid number.
http://www.texotela.co.uk/code/jquery/numeric/ is a great little lightweight plugin that I have used a lot. It takes the pain out of the above.

$("#input").keydown(function(event) {
var theEvent = event || window.event;
var key = theEvent.keyCode || theEvent.which;
// Allow: backspace, delete, tab, escape, and enter
if ( key == 46 || key == 8 || key == 9 || key == 27 || key == 13 || key == 110 || key == 190 ||
// Allow: Ctrl+A
(key == 65 && theEvent.ctrlKey === true) ||
// Allow: home, end, left, right
(key >= 35 && key <= 39)) {
// let it happen, don't do anything
return;
}
else {
// Ensure that it is a number and stop the keypress
if (theEvent.shiftKey || (key < 48 || key > 57) && (key < 96 || key > 105 )) {
theEvent.preventDefault();
}
}
});
with keycode 110 and 190

using jQuery/javascript to restrict price field input

I found the following jQuery code on the internet, but I soon found that it had a deficiency in that it dit not accept a decimal point (ascii code 46) - even though the code appears to allow it.
Currently, I cannot enter prices like 1.23, since the the period is ignored and I get 123 instead.
Can anyone spot whty this is not working?
// Numeric only control handler
$.fn.ForceNumericOnly =
function()
{
return this.each(function()
{
$(this).keydown(function(e)
{
var key = e.charCode || e.keyCode || 0;
// allow backspace, tab, delete, arrows, numbers and keypad numbers ONLY
return (
key == 8 ||
key == 9 ||
key == 46 ||
(key >= 37 && key <= 40) ||
(key >= 48 && key <= 57) ||
(key >= 96 && key <= 105));
})
})
};
I am using the plugin like this:
$(function(){
$('#price_field').ForceNumericOnly();
});

The other users have pretty much answered your question already, but I wanted to provide you with this link.
http://unixpapa.com/js/key.html
I found it quite useful when dealing with keyboard events and making them cross-browser compatible.
I hope this helps.

Just add the . (code 190 and 110) to the checks:
// Numeric only control handler
$.fn.ForceNumericOnly =
function()
{
return this.each(function()
{
$(this).keydown(function(e)
{
var key = e.charCode || e.keyCode || 0;
// allow backspace, tab, delete, arrows, numbers and keypad numbers ONLY
return (
key == 8 ||
key == 9 ||
key == 46 ||
key == 190 || // normal .
key == 110 || // keypad .
(key >= 37 && key <= 40) ||
(key >= 48 && key <= 57) ||
(key >= 96 && key <= 105));
})
})
};

You should add the key code 190 to accept "."
// Numeric only control handler
$.fn.ForceNumericOnly = function() {
return this.each(function()
{
$(this).keydown(function(e)
{
var key = e.charCode || e.keyCode || 0;
// allow dot, backspace, tab, delete, arrows, numbers and keypad numbers ONLY
return (
key == 190 ||
key == 8 ||
key == 9 ||
key == 46 ||
(key >= 37 && key <= 40) ||
(key >= 48 && key <= 57) ||
(key >= 96 && key <= 105));
})
})
};

You need to include 190 and 110 for both decimal points.

// Numeric only control handler
$.fn.ForceNumericOnly =
function()
{
return this.each(function()
{
$(this).keydown(function(e)
{
var key = e.charCode || e.keyCode || 0;
// allow backspace, tab, delete, arrows, numbers and keypad numbers ONLY
return (
key == 190 || //add this line. 190 is the keycode for a period
key == 110 || //and this line. 110 is the keycode for a decimal
key == 8 ||
key == 9 ||
key == 46 ||
(key >= 37 && key <= 40) ||
(key >= 48 && key <= 57) ||
(key >= 96 && key <= 105));
})
})
};