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Some points to note

  • //<![CDATA[ - required when writing JavaScript code inside html page
  • //<![CDATA[ - required to validate xhtml document
  • Linking JavaScript external files will cache.
  • <noscript>…</noscript> used to display message for browser which does not support JavaScript or disable it.
  • <!– html comment to hide from older browsers –> – but now not necessary since all modern browsers supports JavaScript
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