JS Displayed, Not Executed

blips_controller.rb

class BlipsController < ApplicationController

    before_filter :login_required
    respond_to :js
    
    def create
        
        @blip = current_user.blips.build(params[:blip])
        @blip.created_at = Time.now 
        #respond_to do |format|  
            if @blip.save  
              respond_with(@blip)
            else  
              flash[:notice] = "Message failed to save."  
              format.html { redirect_to root_path }  
          end
    end

    def destroy

    end

end

create.js.erb

$(".span2").prepend("<%= escape_javascript(render(@blip)) %>")

index.html.erb

<%# title "Welcome #{current_user.username}"%>

<div class="well">
	<div class="row">
	<div class="span10">
		<h1>
			<%= "Welcome #{current_user.username}!"%>
		</h1>
		<%= form_for :blip, :url => blips_path(:format => :js), :remote => true do |b| %>
			<div class="clearfix">
				<%= b.text_area :message, :class => "xxlarge", :rows => 3 %>
			</div>
			<div class="clearfix">
				<% if current_user.blips.count > 0 %>
					<%= h "Latest message: #{current_user.blips.last.message}" %>
				<% end %>
			</div>
			<div class="clearfix">
				<%= b.submit "Post", :class => "btn primary" %>
			</div>
		<% end %>
	</div>
		<div class="span2">
			
			<%= render :partial => "sidebar" %>
			
		</div>
	</div>
	
<%= render :partial => "blips_list", :locals => { :blips => @blips } %>

</div>