var closed = new Image();
closed.src = "closed.gif";

var open = new Image();
open.src = "open.gif";

arMenu = new Array();

arMenu[0] = new Array("m0"
);

arMenu[1] = new Array("m1",
"sm10",
"sm11",
"sm12"
);

arMenu[2] = new Array("m2"

);


arMenu[3] = new Array("m3"
);


arMenu[4] = new Array("m4"
);

arMenu[5] = new Array("m5"
);


arMenu[6] = new Array("m6"
);

arMenu[7] = new Array("m7"
);


function expandMenu(mn)
{
  // hide all submenus
  for(var i = 0; i < arMenu.length; i++)
  {
   // document.getElementById(arMenu[i][0]).src = closed.src;

    for(var j = 1; j < arMenu[i].length; j++)
    {
      document.getElementById(arMenu[i][j]).style.display = "none";
    }
  }

  // show the requested menus submenu's
  for(var k = 1; k < arMenu[mn].length; k++)
  {
    document.getElementById(arMenu[mn][k]).style.display = "block";
  }
//  document.getElementById(arMenu[mn][0]).src = open.src;
}