function $(element) {
  if (typeof element == 'string')
    element = document.getElementById(element);
  return element;
}


var currTId = null;
var currDId = null;
function mouseOver(obj,tag0,tag1,id)
{

if( currTId!=null)
{
 if($(currTId)) $(currTId).style.display="block";
 if($(currDId)) $(currDId).style.display="none";	   
}	

var Tid = tag0 + id;
var Did = tag1 + id;

if($(Tid)) $(Tid).style.display="none";	   
if($(Did)) $(Did).style.display="block";	  

currTId = Tid;
currDId = Did;

}