[jQuery] A simple Comparison

[jQuery] A simple Comparison

Hi Folks
I am trying a simple Comparison.
IF ($('.field_image04').find(".imagefield-edit-image-row") == null ) ....
When I test in differents .class (.field_image04, .field_image03..) I receive empty, null results or a random text result.
What I need is just do if have result or else do another thing if I havent. (I know do that)
But comparison always return false in both cases.
What is missing? Is it a bug?
Regards
Mario