Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <script src="../../ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("button").click(function(){ $("#span1").text($(window).width()); $("#span2").text($(document).width()); }); }); </script> </head> <body> <p>The width of this window is <span id="span1">unknown</span> px.</p> <p>The width of this document is <span id="span2">unknown</span> px.</p> <button>Return the width of the window and document elements</button> </body> </html>
Result:
W3Schools.com - Try it yourself