What does the :with option do? Here is the code that I am referencing:
<% func = remote_function( :update => 'exclude_1', :url => {:action => 'set_exclude_airline_1', :id => @user.id}, :with => "'id=' + escape(value)" ) -%>
:with: A JavaScript expression specifying the parameters for the XMLHttpRequest. This defaults to value, which in the evaluated context refers to the new field value. If you specify a string without a "=", itll be extended to mean the form key that the value should be assigned to. So :with => "term" gives "term=value". If a "=" is present, no extension will happen.