If by getting error message of email format you are referring to ActiveRecord validation, then these are available through the ActiveRecord#errors methods. For instance:

bq. class User < ActiveRecord::Base

validates_presence_of :name, :email
validates_format_of :email, :with => /^.+@.+\..+$/

end

In your controller, let's say you get your user attributes through the params[:user] hash.

bq. class UsersController < ApplicationController

def create
    @user = User.new(params[:user])
    unless @user.valid?
        flash[:errors] = @user.errors
    else
        redirect_to user_url(@user)
    end
end

end

Finally, in your view:

bq.

Don't blindly paste code without understanding what it is doing. :-)

In this case I think the error is simply that there is a missing '%' at the end of the tag containing the call to update_page_tag. i.e.:

Keep in mind that traditional javascript "popups" are very out of date. Instead use a div layer and display the flash message inside.

flash[:key] = "This will put a flash into the session and after render or redirect it will be available to the request." flash[:key].now = "This will put a flash message into the current response only, so if you redirect it will be gone, but a render will show it"

You could use JQuery to check to see if the div has content (ie a flash message) and if it does, show the layer and center it.

Good luck.