JavaScript DOM HTML method: insertBefore()
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The insertBefore() method (when applied to
HTML
elements in the JavaScript
DOM) inserts
a new child node before an existing child node.
It
has the following syntax with the following parameters. It returns a Node
object representing the new child node.
element.insertBefore(newnode, existingnode)
|
Parameter
|
Required / Optional
|
Description
|
|
newnode
|
Required
|
The node object to be inserted
|
|
existingnode
|
Optional
|
The node object before
which the new node is to be inserted. If not specified then the new node will
be inserted at the end of the element
|
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