var doit = true
function showm(ob,pict) {
  if(doit) {
    document.getElementById(ob).style.height = 'auto'
    document.getElementById(pict).src = '/support/usa_img/arrowd.gif'
    doit = false
  }
  else {
    document.getElementById(ob).style.height = '12'
    document.getElementById(pict).src = '/support/usa_img/arrowr.gif'
  
    doit = true
  }
}