The ability to trigger actions in the browser by HTML events is New to HTML 4.0, like executing a JavaScript when a user clicks on an HTML element.
Here is a list of attributes that define event actions. these attributes can be inserted into HTML tags
Window Events
These are valid only in body and frameset elements
| Attribute |
Value |
Description |
| onload |
script |
Script to be run when a document loads |
| onunload |
script |
Script to be run when a document unloads |
Form Element Events
These are valid only in form elements.
| Attribute |
Value |
Description |
| onchange |
script |
Script to be run when the element changes |
| onsubmit |
script |
Script to be run when the form is submitted |
| onreset |
script |
Script to be run when the form is reset |
| onselect |
script |
Script to be run when the element is selected |
| onblur |
script |
Script to be run when the element loses focus |
| onfocus |
script |
Script to be run when the element gets focus |
Keyboard Events
Not valid in base, bdo, br, frame, frameset, head, html, iframe, meta, param,
script, style, and title elements.
| Attribute |
Value |
Description |
| onkeydown |
script |
What to do when key is pressed |
| onkeypress |
script |
What to do when key is pressed and released |
| onkeyup |
script |
What to do when key is released |
Mouse Events
These are not valid in base, bdo, br, frame, frameset, head, html, iframe, meta, param,
script, style, and title elements.
| Attribute |
Value |
Description |
| onclick |
script |
Action will be taken on mouse click |
| ondblclick |
script |
Action will be taken on doubleclicking the mouse |
| onmousedown |
script |
Action to be performed when mouse button is pressed |
| onmousemove |
script |
Action to be performed when mouse pointer moves |
| onmouseover |
script |
Action to be performed when mouse pointer moves over an element |
| onmouseout |
script |
What to do when mouse pointer moves out of an element |
| onmouseup |
script |
What function to carry when mouse button is released |
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