Retrieves the object that has the focus when the parent document has focus.
dhtml语法
[ oactive = ] document.activeelement
dhtml可能的值
| oActive |
Object that
receives the element that has the focus. |
The property is read-only.
The property has no default value.
Remarks
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.
the active element retains focus in the parent document even when focus is shifted from the parent to another application. if the focus returns to the parent document, focus also returns to the same active element.
Note For versions of Microsoft® Internet Explorer 5 and later, the
activeElement property is not defined until a document is loaded. A value of null is given for this property if accessed inline during the loading of a document. However, this property can be accessed from within the
onload event handler function.
Note Internet Explorer 4.0 returns
body as the
activeelement when accessed inline during the loading of a document.
是否符合公共标准
There is no public standard that applies to this property.
Applies To