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(){ $.ajax({url:"demo_test.txt",success:function(result){ $("#div1").html(result); }}); }); }); </script> </head> <body> <div id="div1"><h2>Let jQuery AJAX Change This Text</h2></div> <button>Get External Content</button> </body> </html>
Result:
W3Schools.com - Try it yourself