// JavaScript Document

		  function SwitchIntro(n){
		  
		  		intro1.style.display='none';
				intro2.style.display='none';
				intro3.style.display='none';
				intro4.style.display='none';
				
		  	if(n==1){
				intro1.style.display='block';
			}
			if(n==2){
				intro2.style.display='block';
			}
			if(n==3){
				intro3.style.display='block';
			}
			if(n==4){
				intro4.style.display='block';
			}
			
		  }
		  

function showLayer2(group, id)
        {
            //´¦ÀíItem
            var count = 1;
            var obj = document.getElementById(group + "_item_" + count);
            while (obj != null)
            {
                obj.className = "bolg_link_new_item";
                
                count++;
                obj = document.getElementById(group + "_item_" + count);
            }
            document.getElementById(group + "_item_" + id).className = "bolg_link_new_item_show";
            
            //´¦ÀíLayer
            count = 1;
            obj = document.getElementById(group + "_layer_" + count);
            while (obj != null)
            {
                obj.style.display = "none";
                
                count++;
                obj = document.getElementById(group + "_layer_" + count);
            }
            document.getElementById(group + "_layer_" + id).style.display = "block";
        }
//menu