function toggle (rowid, buttonid) { 

   var row = document.getElementById(rowid); 
   var button = document.getElementById(buttonid); 
   
   if (row.className=="hide") { 
      row.className="show";
	  button.src="images/button_hide.gif";
   } 
   else { 
      row.className="hide";
	  button.src="images/button_more.gif";
 
   } 
}