title: JQuery: How to make a JQuery plugin from a simple function?
body: <p>I have made this simple function that add placeholders to browsers that do not support them by default, like Explorer 8.</p>
  
  <p><a href="http://jsbin.com/avIfuDAf/2" rel="nofollow"> DEMO </a></p>
  
  <p>The question is: How can i make a plugin with that function? 
  In order to remove the code from the html file and put it in a separate js file?</p>
  
  <p>Thank you!</p>