Standard System Event Support
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Web Parts can be registered to receive notifications for standard system events triggered in the browser. Because the browser supports only a single callback function for events, it is better that Web Parts register for system events rather than try to provide an event handler directly. Support for system events varies depending on whether the browser type is Internet Explorer 5.5 or later or an HTML 3.2 or later browser.
The following table lists the events that are provided automatically by the Web Part infrastructure. The NamespaceURN property is "urn:schemas-microsoft-com:dhtml".
Event Name |
Description |
Browser Support |
|---|---|---|
onafterprint |
Runs on the Window object immediately after its associated document prints. |
Internet Explorer 5.5 or later |
onbeforeprint |
Runs on the Window object before its associated document prints. |
Internet Explorer 5.5 or later |
onbeforeunload |
Runs before a page is unloaded. |
Internet Explorer 5.5 or later |
onblur |
Runs when the Window object loses the input focus. |
Internet Explorer 5.5 or later |
onclick |
Runs when a mouse click is detected in the browser window. |
Internet Explorer 5.5 or later |
onfocus |
Runs when the Window object receives the focus. |
Internet Explorer 5.5 or later |
onhelp |
Runs when the user presses the F1 key while the browser is the active window. |
Internet Explorer 5.5 or later |
onload |
Runs immediately after the browser loads the Window object. |
Internet Explorer 5.5 or later |
onresize |
Runs when the user changes the size of the Window object. |
Internet Explorer 5.5 or later |
onunload |
Runs immediately before the Window object is unloaded. |
Internet Explorer 5.5 or later |
See Also
Concepts
Client-side Programming Using the WPSC