23 Events

..Starting with 4.0, HTML can trigger events in the browser.  An event attribute and the action
to be taken are placed in an HTML tag.

The format is:  < tag     attribute = "script" >  
where script is either script statements or the name of a script to be executed

Where attribute is one of the following:

onload   body, frameset
onunload  script  body, frameset

onchange form elements - value is changed
onsubmit  form elements - form is submitted
onreset  form elements - form is reset
onselect  form elements - element is selected
onblur   form elements - element loses focus
onfocus  form elements - element gets focus


The rest of these attributes are not valid in the following elements:
base, bdo, br, frame, frameset, head, html, iframe, meta, param, script, style, and title elements.

onkeydown  key is pressed
onkeypress  key is pressed and released
onkeyup    key is released

onclick   mouse click
ondblclick   mouse double-click
onmousedown  mouse button is pressed
onmousemove  mouse pointer moves
onmouseout   mouse pointer moves out of an element
onmouseover  mouse pointer moves over an element
onmouseup   mouse button is released