img dynamic mouseover function.

img dynamic mouseover function.

So far jquery is looking good to me. I can create new dynamic img element, parse xml etc. However, couple of things I would like to know -
1. I don't want to create new Ids everytime. Been from extjs background, is there something that does that automatically ?
2. in the below code .. $(this) refers to an xml node.
[code]
              
/// ajax request
                 ....
                var img = .....
                img.mouseover(function() {
                                     alert($(this).find('overview').text());
                          });    
              ...
[/code]

I would want to use the text, I am reading from the xmlresponse. 
However, alert is compiled only when I have my mouseover the img and at that point, this refers to the document.