Just having a play around with some hittest methods i thought of. Just need a few answers.

Can you set more than just 1 x and y coordinate in the hittest.
EG: if (b1.hitTest(b2._x-b2._width/2, b2._y +15 , b2_y - 15, true)) {

To me that seem it would check to see if b1 hits b2's left edge at b2._y - and + 15. Didnt work for me, do i have to rite up 2 seperate hittests for each point?.