Javascript code not working in mozilla firefox?

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Hi sir,
I wrote one javascript code to prevent "space" in textbox. Its working fine in Internet explorer, but it is not working in mozilla firefox. I attached the code below for your reference. Kindly give me the solution for this problem.

Default3.aspx
*******************

ASP.NET

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script>
        function AvoidSpace() {
            if (event.keyCode == 32) {
                event.returnValue = false;
                return false;
            }
        }
        </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
     <asp:TextBox ID="txtEmpName" runat="server" onkeypress="return AvoidSpace()"></asp:TextBox>
    </div>
    </form>
</body>
</html>

Posted 3-May-13 19:11pm

Prabu Spark

Updated 3-May-13 19:30pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v2

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2013-05-03T20:42:00

Problem
You have not passed the event into the function.

Solution
1. You need to do like below.

XML

<asp:TextBox ID="txtEmpName"
             runat="server" 
             onkeypress="return AvoidSpace(event)">
</asp:TextBox>

2. And use this event in the function. Modify the function as below.

JavaScript

function AvoidSpace(event) {
    var k = event ? event.which : window.event.keyCode;
    if (k == 32) return false;
}

Quote:
The onkeypress event is not fired for all key types in all browsers. For details, please see the table below.
To get the pressed key, use the keyCode, charCode and which event properties.

Refer - onkeypress event | keypress event[^].

window.event.keyCode is for Internet Explorer.
event.which is for other browsers.

DEMO
onkeypress Event Demo - restrict space key[^].

Sergey Alexandrovich Kryukov · Answer 2 · 2013-05-03T19:28:00

Solution 1

You only return false and never true. You should return something on all cases.

—SA

Posted 3-May-13 19:28pm

Sergey Alexandrovich Kryukov