Rails - Apr 2008 - how to show validation error msg of model in html area

Hi I m new to ROR

I have some validation that I''m doing in a model.
for example ---->
class Book < ActiveRecord::Base
  belongs_to :subject
  validates_presence_of :title, :message=>"Error Message"
  validates_numericality_of :price, :message=>"Error Message"
end

Now i want to show this error message in html area when title is empty
or when user puts price not a numeric????????

Help meeee....................
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