Hi there,


I am making an order form for sell an item on internet, now i have to create frame for this form e.g name, email, phone, product code, so on .

But now i have some problem , there are how to making simple input validation for numeric only so if the buyer type some letter and it not numeric type it will show an error / alert message .


Do you want to teach me how to do it ?

FYI i am using external script / different directory .

thank you in advance

Hi,

Search “java script form validations “ on Google and you will get lot of scripts that you can use.

Also go to w3schools.com it a good tutorials website for beginners.

Cheers,

~Maneet

You can do this one of 2 ways. Show an error message, or don't allow anything but numbers. I prefer to just not allow anything except numbers.

http://www.htmlcodetutorial.com/form...msupp_158.html
or
http://www.cambiaresearch.com/c4/029...a-TextBox.aspx

isNaN() is your friend.
https://developer.mozilla.org/en/Cor...isNaN_Function

formValue=document.getElementById('inputField').value;
if(isNaN(formValue)===true){
  alert('please input only numbers!');
}

thank you brother ... i love this forum

thanks . it's very helpful

Basicallly When we trying to validate a form some time we need numeric validation for textbox.

We can validate textbox by onkeypress event of the control By checking whether the keycode of the key pressed as the user types falls within the range of the number keys 48-57(i.e 0-9 and '.') ,if not belong to that range it will return false then it will disable the keypress action
function NumericValidation(eventObj)
{
var keycode;

if(eventObj.keyCode) //For IE
keycode = eventObj.keyCode;
else if(eventObj.Which)
keycode = eventObj.Which; // For FireFox
else
keycode = eventObj.charCode; // Other Browser

link drop removed