HTML Element object properties

Property Settable? Description
siblingAbove no The sibling element above, in z-order, or null if topmost.
siblingBelow no The sibling element below, in z-order, or null if bottommost.
above no The element above, in z-order, or enclosing window object if topmost.
below no The sibling element below, in z-order, or enclosing window object if bottommost.