src code

class method Element.siblings

Element.siblings(element) → [Element…]

Collects all of element's siblings and returns them as an Array of elements.

Two elements are siblings if they have the same parent. So for example, the head and body elements are siblings (their parent is the html element).

The returned Array reflects the siblings' order in the document (e.g. an index of 0 refers to element's topmost sibling).

Note that all of Prototype's DOM traversal methods ignore text nodes and return element nodes only.

Examples
<ul>
  <li id="golden-delicious">Golden Delicious</li>
  <li id="mutsu">Mutsu</li>
  <li id="mcintosh">McIntosh</li>
  <li id="ida-red">Ida Red</li>
</ul>

Then:

$('mutsu').siblings();
// -> [li#golden-delicious, li#mcintosh, li#ida-red]

This method can be called either as an instance method or as a generic method. If calling as a generic, pass the instance in as the first argument.