function lnk_onClick(sender, args)
            {
                switch(sender)
                {
                    case "lnkDefaultBase":
                        document.getElementById("pnlDefaultBase").style.display = "block";
                        document.getElementById("pnlDefaultIndividual").style.display = "none";
                        document.getElementById("pnlDefaultGroup").style.display = "none";
                        
                        //document.getElementById("lnkDefaultBase").style.backgroundPosition = "0 -48px";
                        //document.getElementById("lnkDefaultIndividual").style.backgroundPosition = "0 0";
                        //document.getElementById("lnkDefaultGroup").style.backgroundPosition = "0 0";
						
						document.getElementById("lnkDefaultBase").className = "nav-link-unexpected active";
                        document.getElementById("lnkDefaultIndividual").className = "nav-link-individual";
                        document.getElementById("lnkDefaultGroup").className = "nav-link-group";                      
                        
                        document.getElementById("imageRotationDefault").style.display = "block";
                        document.getElementById("imageRotationIndividual").style.display = "none";
                        document.getElementById("imageRotationGroup").style.display = "none";
                        
                        document.getElementById("navSectionalDefault").style.display = "block";
                        document.getElementById("navSectionalIndividual").style.display = "none";
                        document.getElementById("navSectionalGroup").style.display = "none";
                        break;
                    case "lnkDefaultIndividual":
                        document.getElementById("pnlDefaultBase").style.display = "none";
                        document.getElementById("pnlDefaultIndividual").style.display = "block";
                        document.getElementById("pnlDefaultGroup").style.display = "none";
                        
                        //document.getElementById("lnkDefaultBase").style.backgroundPosition = "0 0";
                        //document.getElementById("lnkDefaultIndividual").style.backgroundPosition = "0 -48px";
                        //document.getElementById("lnkDefaultGroup").style.backgroundPosition = "0 0";  
                        
						document.getElementById("lnkDefaultBase").className = "nav-link-unexpected";
                        document.getElementById("lnkDefaultIndividual").className = "nav-link-individual active";
                        document.getElementById("lnkDefaultGroup").className = "nav-link-group";                      
						
                        document.getElementById("imageRotationDefault").style.display = "none";
                        document.getElementById("imageRotationIndividual").style.display = "block";
                        document.getElementById("imageRotationGroup").style.display = "none";
                        
                        document.getElementById("navSectionalDefault").style.display = "none";
                        document.getElementById("navSectionalIndividual").style.display = "block";
                        document.getElementById("navSectionalGroup").style.display = "none";
                        break;
                    case "lnkDefaultGroup":
                        document.getElementById("pnlDefaultBase").style.display = "none";
                        document.getElementById("pnlDefaultIndividual").style.display = "none";
                        document.getElementById("pnlDefaultGroup").style.display = "block";
                        
                        //document.getElementById("lnkDefaultBase").style.backgroundPosition = "0 0";
                        //document.getElementById("lnkDefaultIndividual").style.backgroundPosition = "0 0";
                        //document.getElementById("lnkDefaultGroup").style.backgroundPosition = "0 -48px";
						
						document.getElementById("lnkDefaultBase").className = "nav-link-unexpected";
                        document.getElementById("lnkDefaultIndividual").className = "nav-link-individual";
                        document.getElementById("lnkDefaultGroup").className = "nav-link-group active";                      
                        
                        document.getElementById("imageRotationDefault").style.display = "none";
                        document.getElementById("imageRotationIndividual").style.display = "none";
                        document.getElementById("imageRotationGroup").style.display = "block";
                        
                        document.getElementById("navSectionalDefault").style.display = "none";
                        document.getElementById("navSectionalIndividual").style.display = "none";
                        document.getElementById("navSectionalGroup").style.display = "block";
                        break;
                }
                
                
            }