function exp_coll(ind)

{
 coll(0);
 coll(1);
 coll(2);
 coll(3);
 coll(4);
 s = document.getElementById("sp_" + ind);
 if (s.style.display == 'none')
 {
   s.style.display = 'block';
 }
 else if (s.style.display == 'block')
 {
   s.style.display = 'none';
 }
}

function exp(ind)
{
 s = document.getElementById("sp_" + ind);
 if (!(s)) return false;
 s.style.display = 'block';

}

function coll(ind)
{
 s = document.getElementById("sp_" + ind);
 if (!(s)) return false;
 s.style.display = 'none';
}

function coll_all()
{
 coll(0);
 coll(1);
 coll(2);
 coll(3);
 coll(4);
}