Multiple values select box.

[rahulk]

Hi All

I i have a select box, the modeis multiple selection.
i have populated the cities in the selectbox.

i have selected the multiple cities and as form submit those values goes into
mysql database table.

now while editing i want that as the select box populates itself with cities those values which are already into the table should appear as selected values into selectbox

i am using smarty to populate the values into select box.

i am not getting how can i do this ?

plz let me the right solution for this.