function expandDiv(thaw) {
  if (document.getElementById("sub_"+thaw).style.display == "none") {
      	     document.getElementById("sub_"+thaw).style.display = "";
	     //document.getElementById("sign_"+thaw).innerHTML = "[-]";
	     } else {
	     document.getElementById("sub_"+thaw).style.display = "none";
	     //document.getElementById("sign_"+thaw).innerHTML = "[+]";
	     }
	}