ERB: Embedding Ruby gotchas:

<% 5.times do %>
Blah! <br />
<% end %>
Bah Humbug!

Produces:

	Blah! <br />

	Blah! <br />

	Blah! <br />

	Blah! <br />

	Blah! <br />

	Bah Humbug!


<BR>

-----------------------------------------------------------------------------
* The qualifier -%> removes the newlines from the block

<% 5.times do -%>  
Blah! <br />
<% end -%>

Produces: 
	Blah! <br />
	Blah! <br />
	Blah! <br />
	Blah! <br />
	Blah! <br />
	Bah Humbug!

-----------------------------------------------------------------------------
* The second will produce nothing - html_escape

<!-- h qualifiers -->
Email: <%= h("Email address <blah@isp.com>") %>
Email: <%= "Email address <blah@isp.com>" %>

-----------------------------------------------------------------------------
* link_to allows you link to actions:

	Say <%= link_to "Hello!", :action => "hello" %>

-----------------------------------------------------------------------------


<%= debug(@variableName) %>

and:

<%= javascript_include_tag 'prototype' %>

<% if ENV['RAILS_ENV'] == 'development' %>
    <div id="debug" style="margin: 40px 5px 5px 5px;">
        <a href="#" onclick="Element.toggle('debug_info');return false" style="text-decoration: none; color: #ccc;">Show Debug Info &#10162;</a>
        <div id="debug_info" style="display : none;">
            <%= debug session %>
            <%= debug params %>
        </div>
    </div>
<% end %>