function visibility(obj, anchor) {
	   if (document.getElementById(obj).style.display != "") {
		  document.getElementById(obj).style.display = "";
		  anchor.innerHTML = '<img src="images/hide.gif" border="0" alt="Show/Hide" />';
	   }
	   else {
		  document.getElementById(obj).style.display = "none";
		  anchor.innerHTML = '<img src="images/show.gif" border="0" alt="Show/Hide" />';
	   }
	}