bgimg = new Image();
bgimg.src = "../pic/hint-control-select.gif";

function doMouseOver( mp )
{
  document.getElementById(mp).style.backgroundImage = "url(../pic/hint-control-select.gif)";
}

function doMouseOut( mp )
{
  document.getElementById(mp).style.backgroundImage = "url(../pic/dummy.gif)";
}