$(document).ready( function() {

  $(".button").mouseover(function(e){
    $("#left-"+e.currentTarget.id).attr("className","btn-left-over")
    $("#center-"+e.currentTarget.id).attr("className","btn-center-over")
    $("#right-"+e.currentTarget.id).attr("className","btn-right-over")
  });                                         

  $(".button").mouseout(function(e){
    $("#left-"+e.currentTarget.id).attr("className","btn-left")
    $("#center-"+e.currentTarget.id).attr("className","btn-center")
    $("#right-"+e.currentTarget.id).attr("className","btn-right")
  });
  
});