function openToolTip(obj) {

	var thediv = document.getElementById(obj);
   	thediv.style.visibility = "visible";
   	thediv.style.display = "inline";

}

function closeToolTip(obj) {

	var thediv = document.getElementById(obj);
   	thediv.style.visibility = "hidden";
   	thediv.style.display = "none";

}