function showAndHide(theId) 
{ 
   var el = document.getElementById(theId) 
   if (el.style.display=="none") 
   { 
      el.style.display="block";
   } 
   else 
   { 
      el.style.display="none";
   } 
}
function update(url,index,isSuper)
{
	currentIndex=index;
	currentIsSuper=isSuper;
	document['productBig'].src=url;
	visibleState="hidden";
	if(isSuper)
		visibleState="visible";
	return false;
}