Problems with ajax in Rails 3

Dear all:
I’m new to Rails and I’ve encountered some problems with ajax in
Rails 3. My project is on a Ubuntu 10.04 LTS machine with ruby v1.8.7
and rails v3.0.0.

I’ve changed my rails.js file according to :

and also changed my javascript_include_tag to these three paths:

1.“http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js
2.“http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/jquery-ui.min.js
3.“rails.js”

Everything works just fine except a controller with a ssh connection
behavior.

In my malfunctioned controller:

def remoteStatus
@ip = params[:server][:ip]
@sshid = params[:server][:sshid]
@sshpass = params[:server][:sshpass]
Net::SSH.start(@ip, @sshid, :password => @sshpass) do |
session.exec!(“free | awk ‘NR==2 {print rate = $3/$2*100}’”) do
|channel, stream, data|
@memusage = data
end
end
respond_to do |format|
format.js
end
end

In the remoteStatus.js.erb I have:

$(‘#status_div’).append(“<%=@memusage%>”)

I am pretty sure that I can have the ssh connection result in variable
@memusage. But it seems that it never appends to the status_div block in
the corresponding view. I’m wondering if I am missing something
detailed. Can anyone help me here,please and thanks!

Best regards