[jQuery] jQuery Text Validation/Combo Boxes

Hello, Is there anyway to make a text validation tool such that if in box 1 the user entered dog, then in box 2 dog is entered for them. But if they enter cat in box 1 and attempt to enter cat in box 2 it tells them they have made an invalid selection? Also is there anyway to make it such that i

[jQuery] jQuery Combo Boxes (User Selection) / Text Validation

Is there a way to have a text validation tool for jQuery such that: Box 1: Hi Box 2: Automatically fills with Hi if Hi is entered in Box 1 In another case if, Box 1: Bye Box 2: If the user enters Bye in Box 2 it says that they entered an invalid response Also is it possible to have it such tha