forms 4.5 block navigation question

[Quoted] I need to achieve the following:

I have a multi-record block where users enter employees. I need to have an automatic check for possible duplicates. I use the soundex function to select possible duplicates already in the database. I want to automatically pop up a window with a list of the possible duplicates prior to the user saving a new or updated employee. Because of the restrictions on go-block, there doesn't seem to be any way to do this satisfactorily. The only trigger that allows me to do the go-block (to the block listing possible duplicates) is when-new-item-instance, but [Quoted] this will not fire if the user enters the name and then navigates manually to the save button, which is very likely.

Any ideas on how to achieve this?

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