How can I write a dynamic javascript function that only allow text boxes to accept alphabet values

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Hi Everyone.
I am developing a web based system and i want that my text boxes accept alphabet values only. how can i implement this with javascript or jquery kinldly show me some code please...

i have tried a function as follows but this function does work only in button and in one text box i want dynamic code that work everywhere whenever i will call to it.

What I have tried:

function onlyAlphabets() {
var regex = /^[a-zA-Z]*$/;
if (regex.test(document.getElementById("txtdetail").value)) {
return true;
} else {
alert("Alphabets Only Please.");
return false;
}
}

Posted 18-Dec-16 22:43pm

Muhammd Aamir

Updated 18-Dec-16 23:43pm

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F-ES Sitecore 19-Dec-16 5:27am

To make it "global" put code in a js file that does something like

$("input[type='text']").keyup(onlyAlphabets())

or however it is you instigate this code, then include that js file in the header for your site and it'll work for all inputs. You could also do something like

$("input[data-alphabet='true']").keyup(onlyAlphabets())

then you can add that attribute only to the boxes you want the validation on

<input type=text data-alphabet='true'>

3 solutions

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Harpreet05Kaur · Accepted Answer · 2016-12-18T22:58:00

HI ,
Try to create a generalize function , Like the one :

function onlyAlphabets(strTextboxIdentity) {
var regex = /^[a-zA-Z]*$/;
if (regex.test(document.getElementById( strTextboxIdentity ).value)) {
return true;
} else {
return false;
}
}

Use the above function wherever you want to check alphabet characters for textbox :

var Result = onlyAlphabets(txtdetail);
if(Result == false)
{
alert("Alphabets Only Please.");
return ;
}
else
{
// Your condition which is required here.
}

Peter Leow · Accepted Answer · 2016-12-18T23:15:00

Solution 2

Check this out: JavaScript Tutorial - Allow only alphabets in a textbox using javascript[^]

Posted 18-Dec-16 23:15pm

Peter Leow

Muhammd Aamir · Accepted Answer · 2016-12-18T23:43:00

Thankx To All I have Done this with the following Code and it works for me...

function isAlfa(evt) {
evt = (evt) ? evt : window.event;
var charCode = (evt.which) ? evt.which : evt.keyCode;
if (charCode > 31 && (charCode < 65 || charCode > 90) && (charCode < 97 || charCode > 122)) {
alert("Allow Only Alphabets");
return false;
}
return true;
}

ASP.NET

<asp:TextBox ID="txt_Cat_Name" onkeypress="return isAlfa(event)" runat="server" CssClass="Text"></asp:TextBox>

How can I write a dynamic javascript function that only allow text boxes to accept alphabet values

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