jjingob / -DOCTYPE-html

I use a fantastic javascript organization tree generator named "ECOTree" but the drawing does not work when I put <!DOCTYPE html>. Labels in the boxes are not put in the boxes correctly. You can see the error at sample1.htm on the site below. Could anybody suggest me how to fix. http://www.codeproject.com/script/Articles/ViewDownloads.aspx?aid=16192 (In order to follow my project rule, I have to define <!DOCTYPE html>)