Populates title, not body

This is almost working for me. It manages to fill in the title from the source web page, but nothing shows up in the body on the node creation form. What am I doing wrong?

javascript:t=window.getSelection();void(window.open('http://orangepolitics.org/node/add/blog
?edit[title]='+escape(document.title)+'&edit[body]='+escape(t)+'','_blank','width=640,height=400,
status=yes,resizable=yes,scrollbars=yes'));

(Line breaks added for readability.)