title: How can I get url parameters from a google sites page
body: <p>For a Google site, I want a page to display content based on the url parameters.</p>
  
  <p>Eg. <a href="http://sites.google.com/../mypage?id=123" rel="nofollow">http://sites.google.com/../mypage?id=123</a></p>
  
  <p>Then I want to make a HTTP request using the id and display the result on the page.</p>
  
  <p>Or I want to use App Scripts to perform something and display the result on the page.</p>
  
  <p>How can I do so?</p>