JQuery in master page

JQuery in master page

Hi All,
 
I developed a website using C# and .net 3.5 framework. The application has a master page and in that master page i have rad menu control. The menu control is loaded from DB. The problem is when ever i click on the menu item in master page, there will be a postback. While postback i want the retain the design. i want to use asynchronous Ajax from jquery. Can any one help??
 
Thanks in Advance