How to check that the row inserted is newly inserted in gridview control using javascript?

How can I check whether a row inserted is new in gridview. I am able to get the id but I need to check whether it is the 开发者_如何学JAVAnewly inserted one. Is there any way using javascript? Thanks in advance

One Solution that we can think off is that as a part of validation we will be calling some java script .Use some flag to set, so that insertion of new row can be identified.