Question

using firebug console in firefox for example when execute this script

$("body").css("border","4px solid red");

it will return an error with message:

TypeError: $("body") is null

same in chrome the error:

TypeError: undefined is not a function

any one knows why? and how to use it?

Answer 1

In the case of Amazon, only jQuery is defined, not $, you can use the jQuery() function instead of $() or simply define $=jQuery

Note the version of jQuery is an old one: 1.2.6

Edit

$=jQuery.noConflict() sounds even cleaner