I have a series of webdropdown controls on my page which utilize Javascript and server-side methods to dynamically add/remove values from the lists.  For example, if I have 3 webdropdown controls, each has a list of numbers 1-10.  After the user picks number 1 in the first webdropdown, number 1 must be removed from the other two webdropdown lists (since it's already used).  If the user picks number 2 in the second webdropdown, number 2 must be removed from the first and third webdropdown lists.

My question is...after the user picks a number, the page does a postback and as the code is stripping off the number from each dropdownlist (box), that dropdownlist automatically opens to show the updated list.  Is there a property/method that can control this and always keep the dropdownlist closed unless the user explicitly clicks on the arrow to open it?

Thank you,
Chris