title: ajax loaded content vs normal content?
body: <p>what are the difference between the ajax loaded DOM , and existing DOM of a page,</p>
  
  <p>is all the parts of a html page can be ajax loaded without any difference  compare to existing content,(like meta tag, script,styles etc)</p>
  
  <p>what are the cases the ajax loaded javascript/content differs from normal loaded content?</p>