Not able to call function from external javascript file into my asp.net project

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<%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
    <script type="text/javascript" src="JScript.js">

</script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
&nbsp;&nbsp;&nbsp;&nbsp; firstname&nbsp;&nbsp;
<asp:Button ID="Button1" runat="server" onclick="Button1_Click"
    onclientclick=" return validate()" Text="Button" />
&nbsp;
</asp:Content>

extrenal javascript file is this

C#

function validate() {
    var firstname;
    firstname = document.getElementById("textbox1").value;
    if (firstname == "") {
        alert(" please enter value");
    }
}

kindly help guys.

Posted 13-Nov-14 19:53pm

Member 10874581

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Comments

IpsitaMishra 14-Nov-14 2:01am

Put a semicolon(";") onclientclick=" return validate();"

Member 10874581 14-Nov-14 2:08am

where??

IpsitaMishra 14-Nov-14 2:12am

In your Html..

IpsitaMishra 14-Nov-14 2:13am

Like this

<asp:Button ID="Button1" runat="server" onclick="Button1_Click"
onclientclick=" return validate();" Text="Button" />

Member 10874581 14-Nov-14 2:27am

I have been applied but still not working

IpsitaMishra 14-Nov-14 2:37am

Debug in firebug and see what is the issue?

Member 10874581 14-Nov-14 3:42am

when i am clicking on button than it is redirecting to another page without verifing that either i have enter value in textbox or not r u on team viewer.

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Sagar Rawal · Answer 1 · 2014-11-13T20:43:00

Solution 1

Hi,

Please change your javascript function with this and then try

JavaScript

function validate() {
    var firstname;
    firstname = document.getElementById('TextBox1').value;
    if (firstname == "") {
        alert(" please enter value");
        return false;
    }
}

Posted 13-Nov-14 20:43pm

Sagar Rawal