function changeMenu(tag){ 
 for(i=0; i <9; i++){ 
  if (i==tag) {  
  if(document.getElementById("tag"+i)!=null) document.getElementById("tag"+i).className="tag-selected"; 
  if(document.getElementById("subnav"+i)!=null) document.getElementById("subnav"+i).style.display="block"; 
  }else{ 
  if(document.getElementById("tag"+i)!=null) document.getElementById("tag"+i).className=""; 
  if(document.getElementById("subnav"+i)!=null) document.getElementById("subnav"+i).style.display="none"; 
  } 
 } 
 }