Not sure whether every one is aware of this. I had a strange requirement; whenever user changes a value of a field on the Search Page to a particular value, the value on another field on the search page needs to be populated automatically and needs to be grayed out. I had to burn out my head, and finally found out the solution. But the solution made me feel as a fool ( that simple was the solution). Thought of sharing it over here so that anyone else facing the same problem will be helped.