var lastId="";
var obj=new Object();
function imageShow(name, id){
  var tag=document.getElementById(name+"_"+id);
  tag.style.display="block";
	document.getElementById(name+"_table_"+id).className="h3"
	lastId=obj[name];
	lastId=lastId == null ? "" : lastId;
  if(lastId != "" && lastId != id){
    document.getElementById(name+"_"+lastId).style.display="none";
		document.getElementById(name+"_table_"+lastId).className="h2"
  }
	if(lastId == ""){
		document.getElementById(name+"_1").style.display="none";
		document.getElementById(name+"_table_1").className="h2"
	}
  obj[name]=id;
}