// JavaScript Document
function index2_menu(x)
{
  index2_menuX = "index2_menu" + x;
  index2_contentX = "index2_content" + x;
  //document.getElementById('main222110').style.display = "none";
 
  for (i=1;i<10;i++){
     index2_menuY = "index2_menu" + i;
	 index2_contentY = "index2_content" + i;
	 if(exist(index2_menuY)){
	 document.getElementById(index2_menuY).className = "index2_menu_a";
	 }
	 if(exist(index2_contentY)){
	 document.getElementById(index2_contentY).style.display = "none";
	 }
	 
	 
  }
  
   document.getElementById(index2_menuX).className = "index2_menu_b";
   document.getElementById(index2_contentX).style.display = "block";
}