function currencyConverter( s )
{
	if(s=="Free") return 0;

	var n = s.substr(1);
	
	i = n.indexOf(",");
	while (i!=-1)
	{
		n = n.replace(",","");
		i = n.indexOf(",");
	}

	return parseFloat( n );
}

SortableTable.prototype.addSortType( "Currency", currencyConverter );