returns all tagged elements regardless of their nest level and no white-space. This should locate all elements within the wrapper div.
returns only first-generation children and includes non-tagged text elements. Mozilla returns text elements consisting only of white-space, while IE excludes first-generation elements that contain white-space only.
1st-generation P 2nd-generation A 2nd-generation SPAN
Please let me know if this demo doesn't behave in your browser.