Print button that prints only what's within a div tag

Do you want to have a button on a webpage that allows the user to print only a portion of the content on the webpage?   One approach is to setup your webpage so that the "print" button will only print the content that you put within a "<div>" tag.
NOTE:   another approach to printing only part of a webpage is shown here:
Step 1 - Put this Javascript in your webpage:
function printDiv(divName) {
      var printContents = document.getElementById(divName).innerHTML;    
   var originalContents = document.body.innerHTML;      
   document.body.innerHTML = printContents;     
   document.body.innerHTML = originalContents;
Step 2 - Put a div tag around part of your webpage with an ID:
<div id=example>
 content you want to print here....
Step 3 - Put a button inside your div tag so a user can print the div tag
<input type='button' value='Print This Only' onclick='printDiv(example);'/>"