javascript validation alert msgs not showing in masterpage

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I have created 2webforms login and signup. And later i have created masterpage. I have included these to pages in masterpage.But the problem is that my validations in javascript are not working on masterpage..It is not displaying alert messages like "fill firstname" etc. and when run this form without masterpage all the validations are working.what is the solution to this problem.
here is some code :
<script type="text/javascript">
function Validateform() {
var Firstname = document.getElementById("txtfirst").value;
if (Firstname == "First Name" || Firstname == "") {
alert("Firstname must be filled out");
return false;
}
else {
if (!Firstname.match(/^[a-zA-Z ]*$/) || Firstname.match(/ /) || Firstname.match(/@/) || Firstname.match(/^[#$%^&*()!]/)) {
alert("Invalid firstname");
return false;
}
}

<asp:Button ID="signupbtn" runat="server" Text="Sign Up" onclick="signupbtn_Click" OnClientClick="return Validateform();" Class="button" />

Posted 21-Jan-14 18:56pm

Member 10523130

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2014-01-21T19:04:00

Solution 1

When you implement Master Pages, the id of controls would be changed.

So, try like below...

JavaScript

document.getElementById('<%= txtfirst.ClientID %>');

Posted 21-Jan-14 19:04pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

Member 10523130 22-Jan-14 1:16am

i tried that it is not entering data into database but it is not showing alert msgs for any of the empty text boxes.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 22-Jan-14 2:53am

Please debug and see what is happening.

kedar001 · Answer 2 · 2014-01-21T19:05:00

Solution 2

Try

JavaScript

function Validateform() {
var Firstname = $get('<%= txtfirst.ClientID%>')
if (Firstname.value == "First Name" || Firstname.value == "") {
alert("Firstname must be filled out");
return false;
}
}

Posted 21-Jan-14 19:05pm

kedar001

Comments

Member 10523130 22-Jan-14 1:16am

i tried that it is not entering data into database but it is not showing alert msgs for any of the empty text boxes.