Javascript debugger
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DOMNode->insertBefore()
Adds a new child before a reference node
()
DOMNode {
DOMNode insertBefore(DOMNode newnode,
DOMNode refnode);
}This function inserts a new node right before the reference node. If you plan to do further modifications on the appended child you must use the returned node.
Parameters
- newnode
The new node.
- refnode
The reference node. If not supplied, newnode is appended to the children.
Errors/Exceptions
DOM_NO_MODIFICATION_ALLOWED_ERRRaised if this node is readonly or if the previous parent of the node being inserted is readonly.
DOM_HIERARCHY_REQUEST_ERRRaised if this node is of a type that does not allow children of the type of the newnode node, or if the node to append is one of this node's ancestors or this node itself.
DOM_WRONG_DOCUMENT_ERRRaised if newnode was created from a different document than the one that created this node.
DOM_NOT_FOUNDRaised if refnode is not a child of this node.