An incident which occurs in a particular place during a particular interval of time.
Events are represented by an event object as a member variable of the window object, such as window.event or whether as a parameter to your function
Clicking the above button invokes the alert function. The event handler is added within the event that it handles, like the the form button event tag.
<body onload=”alert(‘hello World’)”>
Displays an alert box when the page has finished loading.
Mouse over this link and look the status bar message.
windows, all form elements, frames
buttons, radio buttons,checkboxes, submit buttons, links
text fields, textareas, select lists
windows, frames, and all form elements
text fields, textareas