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<!-- _message.html.erb -->
 
<%= @message %>

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#new.html.erb
<label>Username </label> <span class="string">&lt;%= f.text_field :username %&gt;&lt;span id="username_message" class="live_validation"&gt;&lt;/span&gt;</span>

<span class="string">&lt;%= observe_field :form_username,
:url =&gt; { :controller =&gt; :live_validations, :action =&gt; :validate_username },
:frequency =&gt; 0.5,
:update =&gt; :username_message,
:with =&gt; "username"  %&gt;</span>

dmix

#new.html.erb
<label>Username </label> 
<%= f.text_field :username %><span id="username_message" class="live_validation"> </span>
 
<%= observe_field :form_username,
:url => { :controller => :live_validations, :action => :validate_username },
:frequency => 0.5,
:update => :username_message,
:with => "username"  %>
</span>

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#new.html.erb
<label>Username </label> 
<%= f.text_field :username %><span id="username_message" class="live_validation"> </span>
 
<%= observe_field :form_username,
:url => { :controller => :live_validations, :action => :validate_username },
:frequency => 0.5,
:update => :username_message,
:with => "username"  %>

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#application.css
.live_validation img { margin-bottom:3px; }

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 $$('div.fieldWithErrors').each(function(field) {
   pageTracker._trackEvent('Form', 'Validation Error', field.down().identify());
 });

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<div class="fieldWithErrors">
    <input id="question_8_street_address" name="question_8[street_address]" type="text" value="" />
</div><

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<div class="fieldWithErrors">
    <input id="question_8_street_address" name="question_8[street_address]" type="text" value="" />
</div>

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def search_food(query)
  base = "http://platform.fatsecret.com/rest/server.api"
  key = "339df5xx11e42b3e7x3x1b21e7d12"
  #added the extra & at the end of the secret
  secret = "215ba9f90c6e4f41b23a149f322d2s7b1&"
  timestamp = Time.now.to_i
  signature_method="HMAC-SHA1"
  nonce = rand(100)
  method = "food.search"

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// model
window.Medication = Backbone.Model.extend({
  defaults: {
    "user_id":  "1002"
  },

  toJSON : function(){ return {
    medication_option: _.clone(this.attributes)}; 
  }
});