// JavaScript Document
function exist(id){
    var s=document.getElementById(id);
    if(s){return true}
    else{return false}
}


   
function menu_js01(x){
   menuX = "menu" + x;
   menu_erjiX = "menu_erji" + x;
  //document.getElementById('main222110').style.display = "none";
 
  for (i=1;i<12;i++){
     menuY = "menu" + i;
	 menu_erjiY = "menu_erji" + i;
	 if(exist(menuY)){
	 document.getElementById(menuY).className = "menu_a";
	 }
	 if(exist(menu_erjiY)){
	 document.getElementById(menu_erjiY).style.display = "none";
	 }
	 
	 
   }
  
   document.getElementById(menuX).className = "menu_b";
   document.getElementById(menu_erjiX).style.display = "block";
   
}

function menu_js02(x){
  menuX = "menu" + x;
  menu_erjiX = "menu_erji" + x;
  for (i=1;i<12;i++){
     menuY = "menu" + i;
	 menu_erjiY = "menu_erji" + i;
	 if(exist(menuY)){
	 document.getElementById(menuY).className = "menu_a";
	 }
	 if(exist(menu_erjiY)){
	 document.getElementById(menu_erjiY).style.display = "none";
	 }
	 
	 
   }
   
  document.getElementById(menuX).className = "menu_b";
  document.getElementById(menu_erjiX).style.display = "block";
   
}