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(){ $(document).ajaxError(function(){ alert("An error occured!"); }); $("button").click(function(){ $("div").load("wrongfile.txt"); }); }); </script> </head> <body> <div><h2>Let AJAX change this text</h2></div> <button>Change Content</button> </body> </html>
Result:
W3Schools.com - Try it yourself