var submenu_ids = new Array('sub_home','sub_about');
/*
var curr_id = submenu_ids[0];
*/ 
function menu_hover(menu_id)
{
  var nlen;
  nlen = submenu_ids.length;
  for (var i=0;i<nlen;i++)
  {
    if (submenu_ids[i] == menu_id)
    {
      showLayer(submenu_ids[i],true);
    }  
    else  
    {
      showLayer(submenu_ids[i],false);
    }
  }   
}

function menu_out()
{
  var nlen;
  nlen = submenu_ids.length;
  for (var i=0;i<nlen;i++)
  {
    if (submenu_ids[i] == curr_id)
    {
      showLayer(submenu_ids[i],true);
    }  
    else  
    {
      showLayer(submenu_ids[i],false);
    }
  }   
}
// Show selected menu
//showLayer(curr_id,true);
//window.attachEvent("onload",menu_out('sub_home'));