<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>event.which demo</title> <script src="https://code.jquery.com/jquery-1.10.2.js"></script></head><body><input id="whichkey" value="type something"><div id="log"></div><script>$( "#whichkey" ).on( "keydown", function( event ) { $( "#log" ).html( event.type + ": " + event.which );});</script></body></html><!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>event.which demo</title> <script src="https://code.jquery.com/jquery-1.10.2.js"></script></head><body><input id="whichkey" value="click here"><div id="log"></div><script>$( "#whichkey" ).on( "mousedown", function( event ) { $( "#log" ).html( event.type + ": " + event.which );});</script></body></html>