function openwin(str) {
  mywind= window.open(str,'comuni','scrollbars=no,resizable=no,width=400,height=200,status=no,location=no,toolbar=no,top=80,left=20').focus();
}

	 var my_window; //nome finestra aperta

function popupopen(str)
{
 my_window = window.open(str ,"mywindow" ,"status=1,width=400,height=200,top=80,left=20");
}
 
function closepopup()
{
 if(my_window && !my_window.closed) // (false === my_window.closed)
 {
    my_window.close ();
 }
}