Remove the event handler changeSize()
.
<!DOCTYPE html> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"> </script>//from w ww.j a va2 s .c o m <script> function changeSize(){ $(this).animate({fontSize: "+=3px"}); } function changeSpacing(){ $(this).animate({letterSpacing: "+=2px"}); } $(document).ready(function(){ $("p").live("click", changeSize); $("p").live("click", changeSpacing); $("button").click(function(){ $("p").die("click", changeSize); }); }); </script> </head> <body> <p>This is a paragraph.</p> <p>This is another paragraph.</p> <p>Click any p element to increase size and letterspacing.</p> <button>test</button><br><br> </body> </html>