Charge movement in a magnetic field along z-axis (into page/out of page) includes IMAGE?

here is the image: http://faculty.normandale.edu/~physics/Hollabaugh/1122/magforceparticle.jpg Predict the direction of the charge (into the page or out of the page) for: a) a proton moving into the page in the (-)z-direction and for... b) an electron moving into page in the (-)z-direction. Someone here... show more here is the image:
http://faculty.normandale.edu/~physics/Hollabaugh/1122/magforceparticle.jpg

Predict the direction of the charge (into the page or out of the page) for:
a) a proton moving into the page in the (-)z-direction and for...
b) an electron moving into page in the (-)z-direction.

Someone here explained that i must open my hand with my fingers stretched towards the particle's velocity, then position my hand's fingers so that they curl/close toward the magnetic field and then, the thumb will indicate a clockwise/counterclockwise direction for a + charge........BUT how can i use this rule for into the page/out of the page particle movement?

i am guessing...
a) force is in the (-)y-direction and the proton is moving out of the page...
b) the electron, force is in the (+)y-direction and the electron is moving into the page...
is this right? im not sure how to do it with my right hand... please, no cross products. haha, i haven't a clue on using cross products..
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