Mouse with analog-signal selector button and method for shifting analog-signal selector button thereof

A mouse with an analog-signal selector button comprising

• a left button disposed on a front part of a top surface of the mouse and pressed by users' fingers,
• a right button arranged at the front part of the top surface of the mouse and pressed by users' fingers, and
• a central wheel set between the left button and the right button and rotated by users' fingers,
• wherein the mouse further includes at least one analog-signal selector button;
• the analog-signal selector button having a selector button and a selector button circuit connected to the selector button;
• wherein the selector button is arranged at a surface of an outer case of the mouse so that users can use fingers to press the selector button or release the selector button in the opposite direction;
• a difference in height of the selector button is equally divided into a number of N travels each of which is defined as a travel range when the selector button is pressed down to the deepest position from the original position;
• wherein the selector button is defined to be at an original travel range when the selector button is in the original position;
• the selector button is defined to be at the Nth travel range when the selector button is pressed down to the deepest position;
• the selector button is defined to be at the nth travel range when the selector button is pressed to move downward a number of n travels;
• wherein both n and N are natural numbers and 0≦n≦N;
• wherein the selector button circuit is mounted in the mouse and is electrically connected to a mouse circuit;
• the selector button circuit makes the mouse circuit generate a number of N characteristic ranges from a lower one to a higher one according to the N travel ranges of the selector button;
• wherein the characteristic range is increased from a lower range to a higher range when the selector button is pressed down from an nth travel range to a (n+1)th travel range by the user;
• wherein the characteristic range is reduced from a higher travel range to a lower travel range when the selector button is released from the (n+1)th travel range to the nth travel range by the user;
• thus the characteristic range is modulated in a real time manner by the user.