var elem;

function popupWindow(o,d,e)
{
// o - Object to display.
// d - Display, true = display, false = hide
// e - element to update
 elem = e;
 var obj = document.getElementById(o);
 if(d)
  obj.style.display = 'block';
 else
  obj.style.display = 'none';
}

function getSignature()
{
 var sigs = "";
 for (var i=0; i < document.forms[0].pqc_cb.length; i++)
 {
  if (document.forms[0].pqc_cb[i].checked)
  {
   sigs = sigs + document.forms[0].pqc_cb[i].value + ',';
  }
 }
 sigs = sigs.substring(0,sigs.length -1);
 if (sigs != "")
 {
  document.forms[1][elem].value = sigs;
  document.getElementById("pqcform").submit();
 }
 popupWindow('popup1',false);
}