function switchTab(index){
                for(var i = 0;i<=2;i++){
                    document.getElementById("hot_N_"+i).className="";
                    document.getElementById("hot_C_"+i).style.display="none";
                }
                document.getElementById("hot_N_"+index).className="on";
                document.getElementById("hot_C_"+index).style.display="block";
            }
			
function switchTab1(index){
                for(var i = 0;i<=1;i++){
                    document.getElementById("update_N_"+i).className="";
                    document.getElementById("update_C_"+i).style.display="none";
                }
                document.getElementById("update_N_"+index).className="on";
                document.getElementById("update_C_"+index).style.display="block";
            }
			
function switchTab2(index){
                for(var i = 0;i<=1;i++){
                    document.getElementById("WhyList_N_"+i).className="";
                    document.getElementById("WhyList_C_"+i).style.display="none";
                }
                document.getElementById("WhyList_N_"+index).className="on";
                document.getElementById("WhyList_C_"+index).style.display="block";
            }