jQuery Grid Plugin - jqGrid

Hello All

Preface

I have to show streets of Moscow in column edittype:select, its about 4000 records, it makes edit window opens slowly. So i show first 500 only and then load rest, after user click "more".

Problem:

Sometimes user tries to edit some row in edit window and find "Street" column empty, because a street from this object can not be found in first 500 streets of my list.

Question:

Please advice me - is there any short way to catch event like this "can not make SELECTED option, because it can not be found in SELECT object" ?

May be there is another short and smart ways to show and adit big datasets in columns?