non case sensitive search

[Ma]

Dear All,

Trying to search via form like this:
<...
<input type="hidden" name="mode" value="itemnquery">
<input type="hidden" name="qlayer" value="cities">
<input type="hidden" name="item" value="NAME">
<input type="TEXT" size="20" name="value" value="" ...

but in the shape file the names of the cities starts with capital letter

Example:

Madrid
Turin
Paris
Riga

and if you search for "ri" - only first 3 will be listed, if you search
for "Ri" only the last will be listed. My question is: How to perform
search without matching the case?

--
Ma