title: I want that image popup in html when user click on tumbnil
body: <p>I want that when user click on image thumbnil then the image popup just like it does in this <a href="http://www.alpacafarmingguide.com/why.htm" rel="nofollow">click here</a></p>
  
  <p>plesase tell me the simplest way to do this as i am new to web development.
  please help me out I am waiting for you kind response.</p>