How can i access javascript variables in JSP?

Question

I want to access Javascript variables in JSP code. How can I do that?

Answer 1

function call()

   {
    var name="xyz";
    window.location.replace=("a.jsp?m="+name);
   }

 String name=request.getParameter("name");

 if(name!=null){
    out.println(name);        
 }