tooltips help

[snow4]

PLEASE HELP WHAT AM I DOING WRONG?

I have an xml list in the format of <COUNTRY value="blah" title="blah">bl ah blah</COUNTRY>

I have a asp dropdownlist that gets all its content from the extensive xml list and dropdownlist html format is:

<asp:DropDownList ID="mCOUNTRY" runat="server" Width="205" onmouseover="showHideTooltip()"> </asp:DropDownList>

-----showHideTooltip () below-----

<script language="JavaScript">

function showHideTooltip() 
{
var obj = document.getElementById("mCOUNTRY");
obj.title[obj.selectedIndex].title;
}

</SCRIPT>

[Dormilich]

and what is that code supposed to do?