Note:
Inserts an element either at the end of the document or after the specified element.
Syntax:
document.getElementById("elementID").insertBefore(param1, param2)
document.all.elementID.insertBefore(param1, param2) // IE only
Parameters:
param1 Required; the new element.
param2 Optional; the element after which to insert the new element.
If omitted, insert at the end.