This property is an
array containing references to all the Layer objects in the current
document. These references are stored in the array in the order in which
they are defined in the source code. The "layerID"
argument is used to access items in the array and this can either be a
string containing the layer name as defined within the <LAYER> or
<ILAYER> tag in the HTML source, or an integer (with '0' being the
first item in the array).
Both examples below return the same results; the first uses the defined
names of the layers and the second uses their reference number within
Note that when accessing the layers by their reference integer, as opposed
to name, they are stored in the array in z-order (from back to front,
with the back-most layer indexed as '0').