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Deprecated since Gecko 1.9 (Firefox 3)
This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. Do not use it in old or new projects. Pages or Web apps using it may break at any time.
Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
Summary
Registers the window to capture all events of the specified type.
Syntax
window.captureEvents(eventType)
eventType is a combination of the following values: Event.ABORT, Event.BLUR, Event.CLICK, Event.CHANGE, Event.DBLCLICK, Event.DRAGDDROP, Event.ERROR, Event.FOCUS, Event.KEYDOWN, Event.KEYPRESS, Event.KEYUP, Event.LOAD, Event.MOUSEDOWN, Event.MOUSEMOVE, Event.MOUSEOUT, Event.MOUSEOVER, Event.MOUSEUP, Event.MOVE, Event.RESET, Event.RESIZE, Event.SELECT, Event.SUBMIT, Event.UNLOAD.
Example
<!DOCTYPE html>
<html lang="en">
<head>
<!-- ... -->
<script>
function reg() {
window.captureEvents(Event.CLICK);
window.onclick = page_click;
}
function page_click() {
alert('page click event detected!');
}
</script>
</head>
<body onload="reg();">
<p>click anywhere on this page.</p>
</body>
</html>
Notes
Events raised in the DOM by user activity (such as clicking buttons or shifting focus away from the current document) generally pass through the high-level window and document objects first before arriving at the object that initiated the event.
When you call the captureEvents() method on the window, events of the type you specify (for example, Event.CLICK) no longer pass through to "lower" objects in the hierarchy. In order for events to "bubble up" in the way that they normally do, you must call window.releaseEvents() ( ) on the window to keep it from trapping events.
Note that you can pass a list of events to this method using the following syntax: window.captureEvents(Event.KEYPRESS | Event.KEYDOWN | Event.KEYUP).
Specification
This is not part of any specification.