Need help please! attachMovie Question

Hi all,

plz help me~~i am an AS beginner.
Could any one example the following code to me??? it is really confusing me:(

yDataBar_movie_OP = new Object();
yDataBar_movie_OP.yName_temp = yName_temp;
yDataBar_movie_OP.yDataBar_movie_OP = yDataBar_movie_OP;
yWholeDataBar_movie = docBg_mc.attachMovie(“yWholeDataBar_mc”, “yWholeDataBar_mc”, 10, yDataBar_movie_OP);

p.s. yName_temp is an array getting value from a xml node

any help is appreciated
pppphhhh