<html><head><script src="https://libs.baidu.com/jquery/2.1.4/jquery.min.js"></script><script>$(document).ready(function(){ $("button").mousedown(function(){ $("p").slideToggle(); }); $("div").mouseover(function(){ $("button").mousedown(); });});</script></head><body><p>This is a paragraph.</p><button>Toggle</button><br><br><div>Mouse over this text to trigger the mousedown event for the button above.</div></body></html>