onload=function() 
   {
       MM_preloadImages('MHmenubackgr.gif');
   }

function HM_m_ovr(HM_PicID) 
  {
   document.getElementById(HM_PicID).style.backgroundImage = 'url(MHmenubackgr.gif)';
  }
  
function HM_m_out(HM_PicID)
  {
    document.getElementById(HM_PicID).style.backgroundImage = ''; 
  }