How to select all from dropdown

[aimee99]

I need an option at the top of my dropdown list so that it will return 'All' the information by default. I've got it set up so that selecting a single option from the picklist works, I just have no clue about getting 'All' from the database as an option.

 

[iza]

set your select as MULTIPLE
then when "all" is selected, fire a function that will loop over all the list elements and explicitly select each element