Hey guys, I'm starting to learn this new piano arrangement, caramelldansen arranged by phillip walker. Normally, I can read sheet music pretty well, but theres a couple things on there that I've never seen before.

Heres an image of one of the part I don't get:

http://img51.imageshack.us/img51/9297/musicimage.jpg
or
http://yfrog.com/1fmusicimagej

and heres the link to the sheet music if it would help looking at the whole thing:
http://josh.agarrado.net/music/anime/index.php?searchterms=caramelldansen&srctype=

So, as you can see, the first bit has some sort of "chord" composed of a whole "d" note on the left side and an eight "d" note (the same note, not an octave higher or something) on the right side. I've got no idea what this means, how are you supposed to play the same exact key while its already pressed down?

Well thx for reading, hopefully you can explain this to me...

i hink that means you use pedal so the d lasts four beats, tbh i don't know why it has the eigth d as well

You hold down the whole note while playing the rest of the eighth notes that equal the whole note. Sounds confusing, but it's simple.