var expires = new Date();
expires.setTime(expires.getTime() + 1000 * 60 * 60);
var expiryDate = expires.toGMTString();

function newCookie(objID, value) {
  document.cookie = objID+"="+value+"; expires=" + expiryDate;
} // end of the 'newCookie()' function

function ShowHideBox(objID) {
	if(document.getElementById(objID).style.visibility == "hidden") { // show
		document.getElementById(objID).style.visibility = "visible";
		document.getElementById(objID).style.display = "block";
		document.getElementById('_'+objID).src = "images/close.png";
		newCookie(objID, "visible");
	} else { // hide
		document.getElementById(objID).style.visibility = "hidden";
		document.getElementById(objID).style.display = "none";
		document.getElementById('_'+objID).src = "images/show.png";
		newCookie(objID, "hidden");
	}
} // end of the 'ShowHideBox()' function