Change the Value of Parent Dropdown using Jquery and the child will show the data

Hi Sir, I just add gridview and copy the article.

So when I click the edit button the parent dropdown changed using Jquery but the child dropdown did not.

If you want sir I would like to get some example for my future reference.

Also I have with the same scenario with the links below, but it did not answer my question. Thank you so much Sir

http://forums.asp.net/t/2036278.aspx?Setting+CascadingDropDown+value+via+JavaScript+jQuery

http://stackoverflow.com/questions/499405/change-the-selected-value-of-a-drop-down-list-with-jquery