function toggleDiv(divname)
{
if(document.getElementById(divname).style.display == 'none')
{
  showdiv(divname);
}
else
{
  hidediv(divname);
}
}

function hidediv(divname) {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById(divname).style.visibility = 'hidden';
document.getElementById(divname).style.display = 'none';
}
}

function showdiv(divname) {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById(divname).style.visibility = 'visible';
document.getElementById(divname).style.display = 'inline';
}
}