How to retain cookie value

Hi Guys,
I have a master page with a dropdown list and search page with few parameters, first time when the search page is loaded the drop down is not having any selected value.
when I do some search by passing parameter we are saving these parameters in a cookie this is all happening with jQuery cookie, the moment I change the drop down value the search state is gone. I want to retain this search parameter cookie when there is any change on the master page. 
This is all MVC.
Please help I have no idea