<html><head><script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script><script>function alertMe(){alert("Hello World!");}$(document).ready(function(){ $("p").click(alertMe); $("button").click(function(){ $("p").unbind("click",alertMe); });});</script></head><body><p>This is a paragraph.</p><p>This is another paragraph.</p><p>Click any p element to trigger an alert box.</p><button>Remove the alert box function from the click event for the p elements</button></body></html>