Untitled

$("<body>").append("<script></script>");

var script=document.createElement('script');
script.type='text/javascript';
script.src=url;

$("body").append(script);

$("body").append("<script>alert('hello world');</script>");

$("body").append($("<script />", {
  src: url
}))

$("body").append($("<script />", {
  html: code
}))