my javascript code is not working

Question

0.00/5 (No votes)

See more:

XML

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

<!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">
<script type ="text/javascript">
    function validate() {
        var firstname = document.getElementById("TextBox1").value;
        if( firstname == )
        {
          alert( " fill");
        }

    }
</script>

    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

        <asp:Label ID="Label1" runat="server" Text="NAME"></asp:Label>
&nbsp;&nbsp;
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
&nbsp;
        <asp:Button ID="Button1" runat="server" onclientclick="validate();"
            Text="Button" />

    </div>
    </form>
</body>
</html>

Posted 14-Nov-14 19:34pm

Member 10874581

Add a Solution

Comments

Black_Rose 15-Nov-14 1:40am

"my javascript code is not working" is not enough to go.Please tell what is the script is about..what u r trying to do..what kind of output u r expecting..

Member 10874581 15-Nov-14 1:43am

I Want...to display alert box....when user click on button when textbox empty.

4 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2014-11-14T19:44:00

Solution 2

A quick look says it's probably this bit:

JavaScript

if( firstname == )

Try

JavaScript

if( firstname == '')

instead...

Posted 14-Nov-14 19:44pm

OriginalGriff

Sergey Alexandrovich Kryukov · Answer 2 · 2014-11-14T19:43:00

Solution 1

This is not valid Javascript code. Right operand of the '==' operator is missing.

—SA

Posted 14-Nov-14 19:43pm

Sergey Alexandrovich Kryukov

v2

Black_Rose · Answer 3 · 2014-11-14T19:46:00

You can try this

HTML

<html>
<body>
<script type='text/javascript'>
function Empty(element, AlertMessage){
	if(element.value.trim()== ""){
		alert(AlertMessage);
		element.focus();
		return false;
	}	
	alert("Textbox Validation: Successful.")
	return true;
}
</script>
<form>
Enter any value or left blank: <input type='text' id='txtBox'/>
<input type='button' 
	/>
</form>
</body>
</html>

Rajesh waran · Answer 4 · 2014-11-14T19:54:00

You are missing the '' in if condition,
Try like this,

HTML

<script language="javascript" type="text/javascript">
function Validate()
{
if (document.getElementById('<%=Textbox1.ClientID %>').value == "")
{
alert("Please Enter Your Field!");
document.getElementById('<%=Textbox1.ClientID %>').focus();
return false;
}
}
</script>

And call the Validate function in ur button,

ASP.NET

<asp:Button Id="Button1" runat="server" OnClientClick="return Validate();" Text="Button" />

my javascript code is not working

4 solutions

Solution 2

Solution 1

Solution 3

Solution 4

Add your solution here

Preview 0