trList=["treeMenu1","treeMenu2","treeMenu3","treeMenu4"];function exMenu(a){for(i=0;i<trList.length;i++){if(a!=trList[i])document.getElementById(trList[i]).style.display="none"}tMenu=document.getElementById(a).style;if(tMenu.display=='none')tMenu.display="block";else tMenu.display="none"}