if (document.images) {

 //aboutus
  var subt_01on = new Image()
  subt_01on.src = rootPath + "images/buttons/on/about/subt_mn001.gif"
 var subt_01off = new Image()
  subt_01off.src = rootPath + "images/buttons/off/about/subt_mn001.gif"

  var subt_02on = new Image()
 subt_02on.src = rootPath + "images/buttons/on/about/subt_mn002.gif"
 var subt_02off = new Image()
  subt_02off.src = rootPath + "images/buttons/off/about/subt_mn002.gif"


 //submenu left-----------------------------------------------------

//aboutus_submenu(left

  var sub_01on = new Image()
  sub_01on.src = rootPath + "images/buttons/on/about/sub_mn001.gif"
 var sub_01off = new Image()
  sub_01off.src = rootPath + "images/buttons/off/about/sub_mn001.gif"

  var sub_02on = new Image()
  sub_02on.src = rootPath + "images/buttons/on/about/sub_mn002.gif"
 var sub_02off = new Image()
 sub_02off.src = rootPath + "images/buttons/off/about/sub_mn002.gif"
	}