$(document).ready(function(){
  $("input").focus(function(){
    $("input").css("background-color","#FFFFCC");
  });
  $("input").blur(function(){
    $("input").css("background-color","#D6D6FF");
  });
});

--------------------------------------------------
jQuery(document).ready(function($){
  $("input").focus(function(){
    $("input").css("background-color","#FFFFCC");
  });
  $("input").blur(function(){
    $("input").css("background-color","#D6D6FF");
  });
});
 

wordpress二次開發第一個jquery對比