validation for 5 text box have different values or not

hello Sir ...

i have minmum 1 and maximum 5 textbox and textbox are created dynamic when user click on add button ...now when user click on submit button i want to validate that every textbox have different value if there is same value then show alert same Value not allow.

this all i want using javascript / jquery.

I am Storing The Value Like This ... Now How To Validate

var Category1 = $("input[name='[0].Category']").val();

var Category2 = $("input[name='[1].Category']").val();

var Category3 = $("input[name='[2].Category']").val();

var Category4 = $("input[name='[3].Category']").val();

var Category5 = $("input[name='[4].Category']").val();