chMenu=0;subMenu=0;
function subopen(tName){
tMenu=(document.all)?document.all(tName).style:document.getElementById(tName).style;
if(tName.substring(0, 3)!="sub"){
  if(chMenu)chMenu.display="none";
  if(subMenu){subMenu.display="none";subMenu=0;}
  if(chMenu==tMenu){chMenu=0;}
  else{chMenu=tMenu;
  tMenu.display="block";}
}else{
  if(subMenu)subMenu.display="none";
  if(subMenu==tMenu){subMenu=0;}
  else{subMenu=tMenu;
  tMenu.display="block";}
}
}