How can HIGHLIGHT imagemap?

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C#

ASP.NET

Javascript

I already have my jscrpt for highlighting the part of the imagemap onmouse over.

But I don't know how the highlight will show and remain when there is an available data on the designated imagemapped part. e.g. I have an image where there are Trees, flower, valley, mountain, and river. The part that has data on the database are, Trees and River. Therefore on pageload the Trees and River is already have a highlight and the remaining are not yet highlight unless when the remaining mouseover. I am using

<asp:PolygonHotSpot  Coordinates="67,411,67,418,66,424,71,425,82,423,76,418,73,411" AlternateText="Flower" PostBackValue="45" TabIndex="45" />

for imagemapping.

I really don't have any idea. About using the highlight.

Please help me in this regard.


Thanks in Advance.