function changebg( obj , color){
	if (document.getElementById)
	{
	theone = eval("document.getElementById('"+obj+"')")
	theone.style.background = color;
	}	
}

function page_nav( t_menu, l_menu){
  path='index.jsp?top_menu=' + t_menu + '&left_menu=' + l_menu;
  window.location=path;
}