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If you have textbox in a form,when a user submits the form,it should check whether the user has filled it or not .The below javascript code will check whether a use filled the text box or left it the default value.this query will validate textbox.
I am trying to validate a text box so that if the default value for the text box or a blank value is provided, it prevents the form from being submitted.
Javascript code is as follows
<script >
function
checkForm()
{
if
(form1.elements['txttext'].value == "" || form1.elements['txttext'].value == "Default
Value")
{
alert("Please
Enter the value in textbox");
form1.elements['txttext'].focus();
return false;
}
else
{
form1.submit();
return true;
}
return true;
}
</script>
Aspx page code is as follows
<asp:TextBox ID="txttext"
runat="server"
Text="Default
Value"></asp:TextBox>
<asp:Button ID="btnsubmit"
runat="server"
Text="submit"
OnClientClick="return
checkForm()" />
