function hover_off(this_element, menutype)
{
  this_element.style.backgroundColor='';
  this_element.style.color='';
}

function hover_on(this_element, menutype)
{
  if (menutype == '')
    menutype = 'main';
  if (menutype == 'main')
    backcolor = '#D5DDDA';
  else
    backcolor = '#EDF1F0';
  this_element.style.backgroundColor = backcolor;
//  this_element.style.color = textcolor;
}