Need to send a variable to part of a MySql query

Hi All Thanks JB for the link to get info about creating a dropdown list populated with the contents of a field in my DB. Now I need to send the selected item from the dropdown list created to a query. In other words my visitor selects lets say London from my created list and London is then included in a query to select all from my table that inc London. In my db the town name is a must have field but my created list show ALL instances of the town name, so my dropdown list looks something like this.. Choose a town London London London Cardiff Dover Dover What I would like to know is how I can just show 1 instance of a towns name if multiple exist in my db so the list looks like this... Choose a town London Cardiff Dover Names used only for demonstration... Any pointers or direct help with this is most appreciated. Dave ;-)