enable and disable character's colliders in specific moments.

Hi! The project I'm doing is a "Ninja Rooftops" like prototipe for smartphones. I have a problem with the character that stop at the generated levels. Now, I want to make the character don't stop at nothing when he is jumping. I think I have to disable the character's collider when this is jumping an enable the collider again to touch the ground but I don't know how to do that. Any help is apriciated. Thanks.