CHECKBOX
<%= check_box_tag :worksafe, 
value = "1", 
checked = image.worksafe, 
:onchange => 
    remote_function(
        :update => "status", 
        :url => "/image/worksafe/" + image.id.to_s
    )%>
    
FORM
<%= form_remote_tag(:update => "status", :url => "/image/worksafe/" + image.id.to_s) %>
<%= check_box_tag :worksafe, value = "1", checked = image.worksafe%>
<%= submit_tag "Change status", :name => image.sha %>
<%= end_form_tag %>