How do you get the focus off a button?

Question

I have a button and the same after the click I would like to remove the focus using javascript, detail do not use mouse using this button on a screen touch, no mouse or keyboard. I use the following function today to go up and down the screen:

$(document).ready(function(){
    $('#up').click(function(){
         $('html, body').animate({scrollTop : $(window).scroll().scrollTop()-500},800);
    });   

    $('#down').click(function(){
         $('html, body').animate({scrollTop : $(window).scroll().scrollTop()+500},800);
    });
});

I need the clicked button to go out of focus.