FF: Firefox, N: Netscape, IE: Internet Explorer

Attribute | The event occurs when... | FF | N | IE
--- | --- | --- | --- | ---
onabort | Loading of an image is interrupted | 1 | 3 | 4
onblur | An element loses focus | 1 | 2 | 3
onchange | The content of a field changes | 1 | 2 | 3
onclick | Mouse clicks an object | 1 | 2 | 3
ondblclick | Mouse double-clicks an object | 1 | 4 | 4
onerror | An error occurs when loading a document or an image | 1 | 3 | 4
onfocus | An element gets focus | 1 | 2 | 3
onkeydown | A keyboard key is pressed | 1 | 4 | 3
onkeypress | A keyboard key is pressed or held down | 1 | 4 | 3
onkeyup | A keyboard key is released | 1 | 4 | 3
onload | A page or an image is finished loading | 1 | 2 | 3
onmousedown | A mouse button is pressed | 1 | 4 | 4
onmousemove | The mouse is moved | 1 | 6 | 3
onmouseout | The mouse is moved off an element | 1 | 4 | 4
onmouseover | The mouse is moved over an element | 1 | 2 | 3
onmouseup | A mouse button is released | 1 | 4 | 4
onreset | The reset button is clicked | 1 | 3 | 4
onresize | A window or frame is resized | 1 | 4 | 4
onselect | Text is selected | 1 | 2 | 3
onsubmit | The submit button is clicked | 1 | 2 | 3
onunload | The user exits the page | 1 | 2 | 3