var lastDiv = null;
var lastContainer = null;

function showDiv( td_, div_ )
{
 var div = document.all( div_ );
 if( div == null )
  return;

 if( lastDiv != div )
 {
  lastDiv = div;
  lastContainer =   document.all( td_ );
  lastContainer.innerHTML = div.innerHTML;
 }
 else
	hideIt();
}

function hideIt()
{
	if( lastContainer != null )
	{
		lastContainer.innerHTML = '';
		lastContainer = null;
		//
		lastDiv = null;
	}
}