1. A method for facilitating selection of an object on a display screen of a computer, comprising the steps of: the computer selecting a specific object on the display screen in response to a user input; the computer extracting any of a plurality of objects displayed on the display screen that overlaps the selected specific object as a selection candidate by following a tree structure of the objects; and the computer displaying a selection switching view including an element representing the selection candidate in the vicinity of the selected specific object; wherein in response to the user selecting a specific element included in the selection switching view, said extracting step is repeated with an object corresponding to the specific element as a new specific object, to rewrite the contents of the selection switching view with the element representing the selection candidate newly extracted through the repetition of the step.