check an item exists in the dropdown list

[grace_ca]

Our application has a combobox that has a list of items. 

The applicate works like this: If the item has already added it won't show in the dropdown list.

I need to check if the item exists before clicking. 

 How to do that?  The only useful attribute for the combobox is childElementCount.

Thanks!

[grace_ca · Accepted solution]

I think I found solution by using the itemcount to loop through and check the combobox object's "options" tag. 

[tphillips]

That's what we usually do, get the itemcount and get each item in a for loop.