onfocusin Event
| DHTML文档教程 |
Fires for an element just prior to setting focus on that element.
dhtml语法
Inline HTML <ELEMENT onfocusin = "handler" ... > All platforms Event property object.onfocusin = handler JScript only object.onfocusin = GetRef("handler") Visual Basic Scripting Edition (VBScript) 5.0 or later only Named script <SCRIPT FOR = object EVENT = onfocusin> Internet Explorer only
Event Information
Bubbles Yes Cancels No To invoke Default action Change focus from the event.srcelement to the event.toelement.
Event Object Properties
Although event handlers in the DHTML Object Model do not receive parameters directly, a handler can query an event object for data.
altKey Sets or retrieves a value that indicates the state of the ALT key. altLeft Sets or retrieves a value that indicates the state of the left ALT key. cancelBubble Sets or retrieves whether the current event should bubble up the hierarchy of event handlers. clientX Sets or retrieves the x-coordinate of the mouse pointer's position relative to the client area of the window, excluding window decorations and scroll bars. clientY Sets or retrieves the y-coordinate of the mouse pointer's position relative to the client area of the window, excluding window decorations and scroll bars. ctrlKey Sets or retrieves the state of the CTRL key. ctrlLeft Sets or retrieves the state of the left CTRL key. offsetX Sets or retrieves the x-coordinate of the mouse pointer's position relative to the object firing the event. offsetY Sets or retrieves the y-coordinate of the mouse pointer's position relative to the object firing the event. screenX Retrieves the x-coordinate of the mouse pointer's position relative to the user's screen. screenY Sets or retrieves the y-coordinate of the mouse pointer's position relative to the user's screen. shiftKey Sets or retrieves the state of the SHIFT key. shiftLeft Retrieves the state of the left SHIFT key. srcElement Sets or retrieves the object that fired the event. type Sets or retrieves the event name from the event object. wheelDelta Sets or retrieves the distance and direction the wheel button has rolled. x Sets or retrieves the x-coordinate, in pixels, of the mouse pointer's position relative to a relatively positioned parent element. y Sets or retrieves the y-coordinate, in pixels, of the mouse pointer's position relative to a relatively positioned parent element.
Remarks
With Internet Explorer 5.5 and later, focus on a document, and the active element of a document can be managed separately. use the onfocusin event to manage formatting changes when an element gains focus.
each document may have up to one active element. set the active element with the setactive or focus methods. using the setactive method has no effect on document focus. using the focus method on an individual element causes the element to gain focus and become the active element, and this causes onfocusin to fire for this active element.
using the focus method on a document that does not have the focus moves the document to the front of the display. additionally, the document's active element gains focus, and this causes onfocusin to fire for this active element.
for a given display, only one element has focus at any given time. striking a key directly affects only the element with focus. events fired by that keystroke may be scripted to affect other documents and child elements.
applies to
A, ADDRESS, APPLET, AREA, B, BDO, BIG, BLOCKQUOTE, BODY, BUTTON, CAPTION, CENTER, CITE, CODE, CUSTOM, DD, DFN, DIR, DIV, DL, document, DT, EM, EMBED, FIELDSET, FONT, FORM, hn, HR, I, IMG, INPUT type=button, INPUT type=checkbox, INPUT type=file, INPUT type=image, INPUT type=reset, INPUT type=password, INPUT type=radio, INPUT type=submit, INPUT type=text, KBD, LABEL, LEGEND, LI, LISTING, MAP, MARQUEE, MENU, nextID, NOBR, OL, P, PLAINTEXT, PRE, RT, RUBY, S, SAMP, SELECT, SMALL, SPAN, STRIKE, STRONG, SUB, SUP, TABLE, TBODY, TD, TEXTAREA, TFOOT, TH, THEAD, TR, TT, U, UL, VAR, XMP
更多语法参考
onfocusout, onbeforedeactivate, ondeactivate, onbeforeactivate, onactivate