Anda bisa mendapatkan serangkaian peristiwa yang dimulai dengan "on" (misalnya onclick) dengan menjalankannya di Konsol Firefox.
(i for(i in document)).filter(function(i)(return i.substring(0,2)=='on'&&(document(i)==null||typeof document(i)=='function');))Anda akan mendapatkan array seperti ini (Firefox 23):
("onreadystatechange", "onmouseenter", "onmouseleave", "onwheel", "oncopy", "oncut", "onpaste", "onbeforescriptexecute", "onafterscriptexecute", "onabort", "oncanplay", "oncanplaythrough", "onchange", "onclick", "oncontextmenu", "ondblclick", "ondrag", "ondragend", "ondragenter", "ondragleave", "ondragover", "ondragstart", "ondrop", "ondurationchange", "onemptied", "onended", "oninput", "oninvalid", "onkeydown", "onkeypress", "onkeyup", "onloadeddata", "onloadedmetadata", "onloadstart", "onmousedown", "onmousemove", "onmouseout", "onmouseover", "onmouseup", "onpause", "onplay", "onplaying", "onprogress", "onratechange", "onreset", "onseeked", "onseeking", "onselect", "onshow", "onstalled", "onsubmit", "onsuspend", "ontimeupdate", "onvolumechange", "onwaiting", "onmozfullscreenchange", "onmozfullscreenerror", "onmozpointerlockchange", "onmozpointerlockerror", "onblur", "onerror", "onfocus", "onload", "onscroll")Firefox, karena mendukung pemahaman array yang digunakan potongan kecil itu.