JavaScript event object_basic knowledge-JS tutorial

This article describes the relevant information about javascript event objects. For more information, see event objects: when an event occurs, the browser automatically creates this object, it also contains the event type and mouse coordinates.

Attribute of the event object: Format: event. attribute.

Notes:

Event indicates the event status, such as the element that triggers the event object, the location and status of the mouse, and the key that is pressed;

The event object is valid only when an event occurs.

The event in firefox is different from that in IE. The global variables in IE are available at any time. In firefox, parameter guidance is used, and temporary variables are used at runtime.

Window. event in IE/Opera and event in Firefox;

The event object is "invalid event.srcelement" in ie, event.tar get in firefox, and both are available in Opera.

Bind event

In JS, You can bind events to an object (Control) by two methods:

First, define a function in head:

The Code is as follows: