<SCRIPT>
function fnAdd()
{
var "LI");
oList.children(0).insertAdjacentElement("BeforeBegin",oNewItem);
oNewItem.innerText = "List Item 0";
}
</SCRIPT>
:
<BODY>
<OL ID = "oList">
<LI>List Item 1</LI>
<LI>List Item 2</LI>
<LI>List Item 3</LI>
</OL>
<INPUT TYPE = "button" VALUE = "Add Item" >
</BODY>