All click events are lowercase, as long as the events are lowercase

Onabort image Load is interrupted 1 3 4
onblur Element loses focus 123
onchange user changes the contents of a domain 123
OnClick mouse click on an object 123
OnDblClick Mouse Double-click an object 144
OnError An error occurred while loading a document or image 134
onfocus Elements Get Focus 123
OnKeyDown Key of a keyboard is pressed 143
onkeypress The key of a keyboard is pressed or pressed 143
OnKeyUp the key of a keyboard is released 143
OnLoad a page or image is finished loading 123
OnMouseDown a mouse button is pressed 144
OnMouseMove Mouse is moved 163
onMouseOut mouse away from an element 144
onMouseOver Mouse is moved above an element 123
OnMouseUp a mouse button is released 144
OnReset reset button was clicked 134
OnResize window or frame is resized 144
Onselect Text is selected 123
OnSubmit submit button was clicked 123
OnUnload

All click events are lowercase, as long as the events are lowercase