How to do numeric validation using JQuery?

How to do numeric validation using JQuery. I have to validate my price field using JQuery. any body knows please share your knowledge with 开发者_运维技巧me :(

If your looking for form validation, you can look into the validation plugin: http://docs.jquery.com/Plugins/Validation

However if you just want some sample code, it could be as simple as this:

$(function() {
  $('ref-to-input').blur(function() {
    if($(this).val().match(/[^\d]/)) {
      // invalid chars detected
    }
  });
});

you could also filter your input to only allow numeric characters:

$(function() {
  $('ref-to-input').keyup(function() {
    $(this).val($(this).val().replace(/[^\d]/, ''));
  });
});

Edit: don't forget to always use server side checking

This is also good for form validation:

http://www.position-absolute.com/articles/jquery-form-validator-because-form-validation-is-a-mess/

Theres an example:

http://www.position-relative.net/creation/formValidator/

use jquery validation plugin

http://www.bassistance.de/jquery-plugins/jquery-plugin-validation/

It contains all the validations like, require, format, size, range, value

function IsNumeric(sText){
    var ValidChars = "0123456789.";
    var IsNumber = true;
    var Char;
    for (i = 0; i < sText.length && IsNumber == true; i++) {
        Char = sText.charAt(i);
        if (ValidChars.indexOf(Char) == -1) {
            IsNumber = false;
        }
    }
    return IsNumber;
}

USE:

if ( IsNumeric(my_number) )
//do some here...

Just need to apply this method in Jquery and you can validate your textbox to just accept number only.

function IsNumberKeyWithoutDecimal(element) {    
var value = $(element).val();
var regExp = "^\\d+$";
return value.match(regExp); 
}

Please see working demo here