top property (window)
Returns a reference to the topmost ancestor window object in the window hierarchy.
- The top property is useful if the current document is placed within a subframe (a frame within a frame) and you need to access the topmost ancestor window.
- If you need the immediate parent window use the parent property.
- To get the host frame or iframe element instead of the parent window, use the frameElement property.
- If you need to walk downwards in the frame window hierarchy, use the contentWindow property. It returns the window object that belongs to a frame or iframe element.
You can find the related objects in the Supported by objects section below.
This property is read-only.
If the current document is in a frame or iframe element the value refers to the topmost ancestor window, else it refers to the current window.
Default: this property has no default value.
Example HTML code 1:
This example illustrates the use of the top property. See the contents of the frameChain.htm and the subFrame.htm files too.
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