I have a customer that wants me to have a list of 10 items with a drop down menu next to each item with the numbers 1 - 10. They would like their customers to rate the items in this list and they would like to make sure no number is used twice. How can I do this?
Have you had a look at the Spry Rating Widgets http://labs.adobe.com/technologies/spry/samples/
It is easy to place a widget observer to ensure that a value is not entered twice.
I hope this helps.
Sorry I should have been a bit more precise. Have a look here
I've used spry rating for some product page developments and I believe spry's rating observer prevents a user from rating twice in the same pageload, but it doesn't prevent a user from entering the same value to different rating elements in one pageload. For instance: spry will let you rate then prevent you from rating again during the same pageload, but you can't use out-of-box spry rating to have a rating scale of 1-10 for 10 items on one page and use spry rating observer to prevent your rating of 5 for item 1 and rating of 5 for item 2.
Therefore I don't think it will work for your request that:
they would like to make sure no number is used twice
It's not the same as:
place a widget observer to ensure that a value is not entered twice.