gistfile1.txt

This :

<%= link_to "Delete", @comment, :method => :delete %> 

With Rails 2 :

<a href="/comments/1" onclick="var f = 
document.createElement('form'); f.style.display = 'none'; 
this.parentNode.appendChild(f); f.method = 'POST'; f.action = 
this.href;var m = document.createElement('input'); 
m.setAttribute('type', 'hidden'); m.setAttribute('name', 
'_method'); m.setAttribute('value', 'delete'); 
f.appendChild(m);f.submit();return false;">Destroy</a> 

With Rails 3 :

<a href="/comments/1" data-method="delete">Destroy</a>