function hideItem(itemName) {
 var hideLinkName = itemName + "Hide";
 var hideLinkObject = document.getElementById(hideLinkName); 
 hideLinkObject.style.visibility = "hidden";
 var showLinkName = itemName + "Show";
 var showLinkObject = document.getElementById(showLinkName); 
 showLinkObject.style.visibility = "visible";
 var itemObject = document.getElementById(itemName);  
 itemObject.style.visibility = "hidden";
 itemObject.style.position = "absolute";
 itemObject.style.left = "-1000em";
 itemObject.style.top = "-1000em";
}

function showItem(itemName) {
 var showLinkName = itemName + "Show";
 var showLinkObject = document.getElementById(showLinkName); 
 showLinkObject.style.visibility = "hidden";
 var hideLinkName = itemName + "Hide";
 var hideLinkObject = document.getElementById(hideLinkName); 
 hideLinkObject.style.visibility = "visible";
 var itemObject = document.getElementById(itemName);  
 itemObject.style.position = "static";
 itemObject.style.left = "auto"; 
 itemObject.style.top = "auto";  
 itemObject.style.visibility = "visible";
}